diff --git a/src/asm/symbol.c b/src/asm/symbol.c
index 2a90aafe..856826db 100644
--- a/src/asm/symbol.c
+++ b/src/asm/symbol.c
@@ -521,7 +521,8 @@ sym_AddEqu(char *tzSym, SLONG value)
 
 		if ((nsym = findsymbol(tzSym, NULL)) != NULL) {
 			if (nsym->nType & SYMF_DEFINED) {
-				yyerror("'%s' already defined", tzSym);
+				yyerror("'%s' already defined in %s(%d)",
+					tzSym, nsym->tzFileName, nsym->nFileLine);
 			}
 		} else
 			nsym = createsymbol(tzSym);
@@ -553,7 +554,8 @@ sym_AddString(char *tzSym, char *tzValue)
 
 	if ((nsym = findsymbol(tzSym, NULL)) != NULL) {
 		if (nsym->nType & SYMF_DEFINED) {
-			yyerror("'%s' already defined", tzSym);
+			yyerror("'%s' already defined in %s(%d)",
+				tzSym, nsym->tzFileName, nsym->nFileLine);
 		}
 	} else
 		nsym = createsymbol(tzSym);
@@ -656,7 +658,8 @@ sym_AddReloc(char *tzSym)
 
 		if ((nsym = findsymbol(tzSym, scope)) != NULL) {
 			if (nsym->nType & SYMF_DEFINED) {
-				yyerror("'%s' already defined", tzSym);
+				yyerror("'%s' already defined in %s(%d)",
+					tzSym, nsym->tzFileName, nsym->nFileLine);
 			}
 		} else
 			nsym = createsymbol(tzSym);
@@ -785,7 +788,8 @@ sym_AddMacro(char *tzSym)
 
 		if ((nsym = findsymbol(tzSym, NULL)) != NULL) {
 			if (nsym->nType & SYMF_DEFINED) {
-				yyerror("'%s' already defined", tzSym);
+				yyerror("'%s' already defined in %s(%d)",
+					tzSym, nsym->tzFileName, nsym->nFileLine);
 			}
 		} else
 			nsym = createsymbol(tzSym);