diff --git a/src/output/amgc_output_enum.c b/src/output/amgc_output_enum.c
index 3c8288b..99d6bfb 100644
--- a/src/output/amgc_output_enum.c
+++ b/src/output/amgc_output_enum.c
@@ -67,7 +67,7 @@ static int output_enum(
 		else if ((enumval->enumval >= 0) && (enumval->enumval < 2048))
 			fprintf(fout,"= %d",enumval->enumval);
 		else
-			fprintf(fout,"= 0x%08x",enumval->enumval);
+			fprintf(fout,"= 0x%08x",(unsigned)enumval->enumval);
 
 		if (fputs(",\n",fout) < 0)
 			return -1;