1 files changed, 1 insertions, 1 deletions
diff --git a/test/big.c b/test/big.c
index 463b5cc..66d5870 100644
--- a/test/big.c
+++ b/test/big.c
@@ -83,7 +83,7 @@ is_sparse(void)
     if (stat("x.h5", &sb)<0) return 0;
     if (unlink("x.h5")<0) return 0;
 #ifdef HAVE_STAT_ST_BLOCKS
-    return (sb.st_blocks*512 < (unsigned)sb.st_size);
+    return ((unsigned long)sb.st_blocks*512 < (unsigned long)sb.st_size);
 #else
     return (0);
 #endif