diff --git a/cmake/TestFileOffsetBits.c b/cmake/TestFileOffsetBits.c
index 993b2da4..7cf93b71 100644
--- a/cmake/TestFileOffsetBits.c
+++ b/cmake/TestFileOffsetBits.c
@@ -3,7 +3,7 @@
 int main(int argc, char **argv)
 {
   /* Cause a compile-time error if off_t is smaller than 64 bits */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T (((off_t) (1LL << 62)) - 1 + ((off_t) (1LL << 62)))
   int off_t_is_large[ (LARGE_OFF_T % 2147483629 == 721 && LARGE_OFF_T % 2147483647 == 1) ? 1 : -1 ];  
   return 0;
 }