diff --git a/include/link/assign.h b/include/link/assign.h
index 1dab916a..9db93f49 100644
--- a/include/link/assign.h
+++ b/include/link/assign.h
@@ -35,6 +35,9 @@ extern void CreateSymbolTable(void);
 extern SLONG MaxBankUsed;
 extern SLONG MaxAvail[MAXBANKS];
 
+int
+IsSectionNameInUse(const char *name);
+
 void
 SetLinkerscriptName(char *tzLinkerscriptFile);
 
diff --git a/src/link/assign.c b/src/link/assign.c
index 00829b9e..0847fa29 100644
--- a/src/link/assign.c
+++ b/src/link/assign.c
@@ -216,6 +216,23 @@ FindLargestSection(enum eSectionType type, bool bankFixed)
 	return r;
 }
 
+int
+IsSectionNameInUse(const char *name)
+{
+	struct sSection *pSection;
+
+	pSection = pSections;
+	while (pSection) {
+		if (strcmp(pSection->pzName, name) == 0)
+			return 1;
+
+		pSection = pSection->pNext;
+	}
+
+	return 0;
+}
+
+
 int
 IsSectionSameTypeBankAndFloating(const char *name, enum eSectionType type, int bank)
 {
diff --git a/src/link/object.c b/src/link/object.c
index c0ae5136..dd3fefeb 100644
--- a/src/link/object.c
+++ b/src/link/object.c
@@ -9,6 +9,7 @@
 #include <string.h>
 
 #include "extern/err.h"
+#include "link/assign.h"
 #include "link/mylink.h"
 #include "link/main.h"
 
@@ -288,14 +289,19 @@ obj_ReadRGBSection(FILE * f, enum ObjectFileContents contents)
 {
 	struct sSection *pSection;
 
-	pSection = AllocSection();
+	char * pzName;
 
 	if (contents & CONTAINS_SECTION_NAME) {
-		readasciiz(&pSection->pzName, f);
+		readasciiz(&pzName, f);
+		if (IsSectionNameInUse(pzName))
+			errx(1, "Section name \"%s\" is already in use.", pzName);
 	} else {
-		pSection->pzName = "";
+		pzName = "";
 	}
 
+	pSection = AllocSection();
+	pSection->pzName = pzName;
+
 	pSection->nByteSize = readlong(f);
 	pSection->Type = (enum eSectionType) fgetc(f);
 	pSection->nOrg = readlong(f);