diff --git a/src/output/amgc_output_enum.c b/src/output/amgc_output_enum.c
index 99d6bfb..9498774 100644
--- a/src/output/amgc_output_enum.c
+++ b/src/output/amgc_output_enum.c
@@ -40,7 +40,7 @@ static int output_enum(
 				? enumval->altname
 				: enumval->entity->base.symbol->string);
 
-			if (len > elayout.symwidth)
+			if (len > (unsigned)elayout.symwidth)
 				elayout.symwidth = len;
 		}
 	}