1 files changed, 1 insertions, 1 deletions

diff --git a/test/filters/memwrexe.c b/test/filters/memwrexe.c
index 797e7881d..e68176b42 100644
--- a/test/filters/memwrexe.c
+++ b/test/filters/memwrexe.c
@@ -65,7 +65,7 @@ int main(int argc, char **argv) {
                 }
 
                 void *p = mmap (0, size, PROT_READ, MAP_SHARED, fd, 0);
-                if (!p) {
+                if (p == MAP_FAILED) {
                         fprintf(stderr, "TESTING ERROR: cannot map file for mprotect test\n");
                         return 1;
                 }