diff --git a/src/unif.cpp b/src/unif.cpp
index 0e6267d0..5308c5c9 100644
--- a/src/unif.cpp
+++ b/src/unif.cpp
@@ -484,7 +484,7 @@ int LoadUNIFChunks(FCEUFILE *fp)
 			x++;
 		}
 		if(!t)
-			if(FCEU_fseek(fp,uchead.info,SEEK_CUR))
+			if(FCEU_fseek(fp,uchead.info,SEEK_CUR)<0)
 				return(0);
 	}
 }