diff --git a/skeletons/per_opentype.c b/skeletons/per_opentype.c
index 5a7439f..ec61ae3 100644
--- a/skeletons/per_opentype.c
+++ b/skeletons/per_opentype.c
@@ -183,7 +183,7 @@
 		case 0: break;
 		default:
 			ASN_DEBUG("Non-blank padding (%d bits 0x%02x)",
-				padding, pvalue);
+				padding, (int)pvalue);
 			UPDRESTOREPD;
 			_ASN_DECODE_FAILED;
 		}