diff --git a/apps/metadata/aiff.c b/apps/metadata/aiff.c
index 07d02dbcb6..6c16a3c226 100644
--- a/apps/metadata/aiff.c
+++ b/apps/metadata/aiff.c
@@ -65,7 +65,7 @@ bool get_aiff_metadata(int fd, struct mp3entry* id3)
 
         if (size > sizeof(buf))
         {
-            DEBUGF("AIFF \"%4.4s\" chunk too large (%lu > %zd)",
+            DEBUGF("AIFF \"%4.4s\" chunk too large (%zd > %zd)",
                     (char*) &buf[0], size, sizeof(buf));
         }