diff --git a/include/asm/charmap.hpp b/include/asm/charmap.hpp
index 8d291b8d..68d0ff5a 100644
--- a/include/asm/charmap.hpp
+++ b/include/asm/charmap.hpp
@@ -3,7 +3,6 @@
 #ifndef RGBDS_ASM_CHARMAP_H
 #define RGBDS_ASM_CHARMAP_H
 
-#include <stdbool.h>
 #include <stdint.h>
 
 #define DEFAULT_CHARMAP_NAME "main"
diff --git a/include/asm/format.hpp b/include/asm/format.hpp
index c7a3b49b..632f3362 100644
--- a/include/asm/format.hpp
+++ b/include/asm/format.hpp
@@ -3,7 +3,6 @@
 #ifndef RGBDS_FORMAT_SPEC_H
 #define RGBDS_FORMAT_SPEC_H
 
-#include <stdbool.h>
 #include <stdint.h>
 
 enum FormatState {
diff --git a/include/asm/fstack.hpp b/include/asm/fstack.hpp
index efb8b253..45fa907b 100644
--- a/include/asm/fstack.hpp
+++ b/include/asm/fstack.hpp
@@ -5,7 +5,6 @@
 #ifndef RGBDS_ASM_FSTACK_H
 #define RGBDS_ASM_FSTACK_H
 
-#include <stdbool.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <string>
diff --git a/include/asm/lexer.hpp b/include/asm/lexer.hpp
index 52dbecb2..68f0d35f 100644
--- a/include/asm/lexer.hpp
+++ b/include/asm/lexer.hpp
@@ -3,8 +3,6 @@
 #ifndef RGBDS_ASM_LEXER_H
 #define RGBDS_ASM_LEXER_H
 
-#include <stdbool.h>
-
 #define MAXSTRLEN 255
 
 struct LexerState;
diff --git a/include/asm/macro.hpp b/include/asm/macro.hpp
index 7e2247b2..7a5fc1e3 100644
--- a/include/asm/macro.hpp
+++ b/include/asm/macro.hpp
@@ -4,7 +4,6 @@
 #define RGBDS_MACRO_H
 
 #include <stdint.h>
-#include <stdbool.h>
 #include <stdlib.h>
 
 #include "asm/warning.hpp"
diff --git a/include/asm/main.hpp b/include/asm/main.hpp
index 957a423d..05e47844 100644
--- a/include/asm/main.hpp
+++ b/include/asm/main.hpp
@@ -3,7 +3,6 @@
 #ifndef RGBDS_MAIN_H
 #define RGBDS_MAIN_H
 
-#include <stdbool.h>
 #include <stdint.h>
 #include <stdio.h>
 
diff --git a/include/asm/opt.hpp b/include/asm/opt.hpp
index 3bb70958..59a4ad3f 100644
--- a/include/asm/opt.hpp
+++ b/include/asm/opt.hpp
@@ -3,7 +3,6 @@
 #ifndef RGBDS_OPT_H
 #define RGBDS_OPT_H
 
-#include <stdbool.h>
 #include <stdint.h>
 
 void opt_B(char const chars[2]);
diff --git a/include/asm/rpn.hpp b/include/asm/rpn.hpp
index c47b0416..63561adf 100644
--- a/include/asm/rpn.hpp
+++ b/include/asm/rpn.hpp
@@ -4,7 +4,6 @@
 #define RGBDS_ASM_RPN_H
 
 #include <stdint.h>
-#include <stdbool.h>
 
 #include "linkdefs.hpp"
 
diff --git a/include/asm/section.hpp b/include/asm/section.hpp
index 17d39945..8bf7d5ad 100644
--- a/include/asm/section.hpp
+++ b/include/asm/section.hpp
@@ -4,7 +4,6 @@
 #define RGBDS_SECTION_H
 
 #include <stdint.h>
-#include <stdbool.h>
 
 #include "linkdefs.hpp"
 #include "platform.hpp" // NONNULL
diff --git a/include/asm/symbol.hpp b/include/asm/symbol.hpp
index 8ea1073f..60b28c88 100644
--- a/include/asm/symbol.hpp
+++ b/include/asm/symbol.hpp
@@ -3,7 +3,6 @@
 #ifndef RGBDS_SYMBOL_H
 #define RGBDS_SYMBOL_H
 
-#include <stdbool.h>
 #include <stdint.h>
 #include <string.h>
 #include <time.h>
diff --git a/include/hashmap.hpp b/include/hashmap.hpp
index afcba1ca..4ee2fd53 100644
--- a/include/hashmap.hpp
+++ b/include/hashmap.hpp
@@ -5,7 +5,6 @@
 #define RGBDS_LINK_HASHMAP_H
 
 #include <assert.h>
-#include <stdbool.h>
 
 #define HASH_NB_BITS 32
 #define HALF_HASH_NB_BITS 16
diff --git a/include/link/main.hpp b/include/link/main.hpp
index 5cefb68a..c9ad0823 100644
--- a/include/link/main.hpp
+++ b/include/link/main.hpp
@@ -5,7 +5,6 @@
 #define RGBDS_LINK_MAIN_H
 
 #include <stdint.h>
-#include <stdbool.h>
 #include <stdio.h>
 
 #include "helpers.hpp"
diff --git a/include/link/patch.hpp b/include/link/patch.hpp
index 1973aa28..e8273dcd 100644
--- a/include/link/patch.hpp
+++ b/include/link/patch.hpp
@@ -4,7 +4,6 @@
 #ifndef RGBDS_LINK_PATCH_H
 #define RGBDS_LINK_PATCH_H
 
-#include <stdbool.h>
 #include <stdint.h>
 
 #include "link/section.hpp"
diff --git a/include/link/section.hpp b/include/link/section.hpp
index bf7558e5..870e778b 100644
--- a/include/link/section.hpp
+++ b/include/link/section.hpp
@@ -7,7 +7,6 @@
 // GUIDELINE: external code MUST NOT BE AWARE of the data structure used!
 
 #include <stdint.h>
-#include <stdbool.h>
 
 #include "link/main.hpp"
 
diff --git a/include/linkdefs.hpp b/include/linkdefs.hpp
index 567398ab..41a4f292 100644
--- a/include/linkdefs.hpp
+++ b/include/linkdefs.hpp
@@ -4,7 +4,6 @@
 #define RGBDS_LINKDEFS_H
 
 #include <assert.h>
-#include <stdbool.h>
 #include <stdint.h>
 #include <string>
 
diff --git a/src/asm/charmap.cpp b/src/asm/charmap.cpp
index 7a049168..356d0a18 100644
--- a/src/asm/charmap.cpp
+++ b/src/asm/charmap.cpp
@@ -2,7 +2,6 @@
 
 #include <errno.h>
 #include <new>
-#include <stdbool.h>
 #include <stdint.h>
 #include <stdlib.h>
 #include <stdio.h>
diff --git a/src/asm/format.cpp b/src/asm/format.cpp
index 553e5c77..ebd2e28c 100644
--- a/src/asm/format.cpp
+++ b/src/asm/format.cpp
@@ -3,7 +3,6 @@
 #include <assert.h>
 #include <inttypes.h>
 #include <math.h>
-#include <stdbool.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/src/asm/lexer.cpp b/src/asm/lexer.cpp
index 7d71405d..d25b0606 100644
--- a/src/asm/lexer.cpp
+++ b/src/asm/lexer.cpp
@@ -9,7 +9,6 @@
 #include <inttypes.h>
 #include <math.h>
 #include <limits.h>
-#include <stdbool.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/src/asm/macro.cpp b/src/asm/macro.cpp
index 80776491..208bf3b1 100644
--- a/src/asm/macro.cpp
+++ b/src/asm/macro.cpp
@@ -3,7 +3,6 @@
 #include <errno.h>
 #include <new>
 #include <inttypes.h>
-#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/src/asm/opt.cpp b/src/asm/opt.cpp
index d77d9beb..82f2ad59 100644
--- a/src/asm/opt.cpp
+++ b/src/asm/opt.cpp
@@ -2,7 +2,6 @@
 
 #include <ctype.h>
 #include <errno.h>
-#include <stdbool.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/src/asm/parser.y b/src/asm/parser.y
index 1ed52d7f..dbd71f27 100644
--- a/src/asm/parser.y
+++ b/src/asm/parser.y
@@ -4,7 +4,6 @@
 #include <ctype.h>
 #include <errno.h>
 #include <inttypes.h>
-#include <stdbool.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/src/asm/section.cpp b/src/asm/section.cpp
index bd3e18bd..df9171e1 100644
--- a/src/asm/section.cpp
+++ b/src/asm/section.cpp
@@ -4,7 +4,6 @@
 #include <assert.h>
 #include <errno.h>
 #include <inttypes.h>
-#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string>
diff --git a/src/fix/main.cpp b/src/fix/main.cpp
index f21b5b25..1b30106b 100644
--- a/src/fix/main.cpp
+++ b/src/fix/main.cpp
@@ -7,7 +7,6 @@
 #include <inttypes.h>
 #include <limits.h>
 #include <stdarg.h>
-#include <stdbool.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/src/hashmap.cpp b/src/hashmap.cpp
index cd26211d..4ccff3ea 100644
--- a/src/hashmap.cpp
+++ b/src/hashmap.cpp
@@ -1,7 +1,6 @@
 /* SPDX-License-Identifier: MIT */
 
 #include <stdint.h>
-#include <stdbool.h>
 #include <stdlib.h>
 #include <string.h>
 #include <assert.h>
diff --git a/src/link/assign.cpp b/src/link/assign.cpp
index 22daf95d..bb6b39ca 100644
--- a/src/link/assign.cpp
+++ b/src/link/assign.cpp
@@ -1,7 +1,6 @@
 /* SPDX-License-Identifier: MIT */
 
 #include <inttypes.h>
-#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/src/link/main.cpp b/src/link/main.cpp
index 96467e84..3129f427 100644
--- a/src/link/main.cpp
+++ b/src/link/main.cpp
@@ -3,7 +3,6 @@
 #include <assert.h>
 #include <inttypes.h>
 #include <limits.h>
-#include <stdbool.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdint.h>
diff --git a/src/link/section.cpp b/src/link/section.cpp
index 4c52b38b..80fae9aa 100644
--- a/src/link/section.cpp
+++ b/src/link/section.cpp
@@ -2,7 +2,6 @@
 
 #include <assert.h>
 #include <inttypes.h>
-#include <stdbool.h>
 #include <stdlib.h>
 #include <string.h>
 
diff --git a/src/link/symbol.cpp b/src/link/symbol.cpp
index 46aeb550..778d1354 100644
--- a/src/link/symbol.cpp
+++ b/src/link/symbol.cpp
@@ -1,7 +1,6 @@
 /* SPDX-License-Identifier: MIT */
 
 #include <inttypes.h>
-#include <stdbool.h>
 #include <stdlib.h>
 
 #include "link/object.hpp"