diff --git a/devmem.c b/devmem.c
index 0771912..11b4516 100644
--- a/devmem.c
+++ b/devmem.c
@@ -64,7 +64,7 @@
   }
 
   base = mmap(NULL, 2*pagesize, PROT_READ | PROT_WRITE,
-              MAP_SHARED | MAP_FIXED, mem_fd, addr & ~(pagesize-1));
+              MAP_SHARED, mem_fd, addr & ~(pagesize-1));
 
   if (base == MAP_FAILED) {
     perror("mmap failed");