diff --git a/drivers/io/io_memmap.c b/drivers/io/io_memmap.c
index bf59d6a..5595e60 100644
--- a/drivers/io/io_memmap.c
+++ b/drivers/io/io_memmap.c
@@ -9,6 +9,7 @@
 #include <io_driver.h>
 #include <io_memmap.h>
 #include <io_storage.h>
+#include <platform_def.h>
 #include <string.h>
 #include <utils.h>
 
@@ -169,7 +170,6 @@
 	size_t pos_after;
 
 	assert(entity != NULL);
-	assert(buffer != (uintptr_t)NULL);
 	assert(length_read != NULL);
 
 	fp = (file_state_t *) entity->info;
@@ -197,7 +197,6 @@
 	size_t pos_after;
 
 	assert(entity != NULL);
-	assert(buffer != (uintptr_t)NULL);
 	assert(length_written != NULL);
 
 	fp = (file_state_t *) entity->info;