diff --git a/src/core/libs/supl/asn-rrlp/converter-sample.c b/src/core/libs/supl/asn-rrlp/converter-sample.c
index 0a682a275..13baad2e7 100644
--- a/src/core/libs/supl/asn-rrlp/converter-sample.c
+++ b/src/core/libs/supl/asn-rrlp/converter-sample.c
@@ -384,7 +384,7 @@ buffer_dump() {
 			(long)DynamicBuffer.length - 1,
 			(long)8 - DynamicBuffer.unbits);
 	} else {
-		fprintf(stderr, " %d\n", DynamicBuffer.length);
+		fprintf(stderr, " %ld\n", DynamicBuffer.length);
 	}
 }