diff --git a/src/fmm.c b/src/fmm.c
index 94193c0b6f..2f2eb73f8b 100644
--- a/src/fmm.c
+++ b/src/fmm.c
@@ -2184,7 +2184,7 @@ static void *reserve_address(void *addr, long long unsigned int len)
 
 	ret_addr = mmap(addr, len, PROT_NONE,
 				 MAP_ANONYMOUS | MAP_NORESERVE | MAP_PRIVATE, -1, 0);
-	if (addr == MAP_FAILED)
+	if (ret_addr == MAP_FAILED)
 		return NULL;
 
 	return ret_addr;