diff --git a/include/link/symbol.h b/include/link/symbol.h
index 3be6e43c..29fdfdcf 100644
--- a/include/link/symbol.h
+++ b/include/link/symbol.h
@@ -4,7 +4,7 @@
 #include "types.h"
 
 void sym_Init(void);
-void sym_CreateSymbol(char *tzName, SLONG nValue, SBYTE nBank);
+void sym_CreateSymbol(char *tzName, SLONG nValue, SLONG nBank);
 SLONG sym_GetValue(char *tzName);
 SLONG sym_GetBank(char *tzName);
 
diff --git a/src/link/symbol.c b/src/link/symbol.c
index b0040022..36cbd7d5 100644
--- a/src/link/symbol.c
+++ b/src/link/symbol.c
@@ -76,7 +76,7 @@ sym_GetBank(char *tzName)
 }
 
 void 
-sym_CreateSymbol(char *tzName, SLONG nValue, SBYTE nBank)
+sym_CreateSymbol(char *tzName, SLONG nValue, SLONG nBank)
 {
 	if (strcmp(tzName, "@") == 0)
 		return;