diff --git a/firmware/malloc/bmalloc.h b/firmware/malloc/bmalloc.h
index b97236dccf..4bb89b9adb 100644
--- a/firmware/malloc/bmalloc.h
+++ b/firmware/malloc/bmalloc.h
@@ -16,9 +16,15 @@
  * KIND, either express or implied.
  *
  ****************************************************************************/
+#ifndef _BMALLOC_H_
+#define _BMALLOC_H_
+
+#include <stdlib.h>
+
 int bmalloc_add_pool(void *start, size_t size);
 void bmalloc_status(void);
 
 void *bmalloc(size_t size);
 void bfree(void *ptr);
 
+#endif
diff --git a/firmware/malloc/dmalloc.h b/firmware/malloc/dmalloc.h
index 3314e7e7d3..96772a46f5 100644
--- a/firmware/malloc/dmalloc.h
+++ b/firmware/malloc/dmalloc.h
@@ -16,6 +16,10 @@
  * KIND, either express or implied.
  *
  ****************************************************************************/
+#ifndef _DMALLOC_H_
+#define _DMALLOC_H_
+
+#include <stdlib.h>
 
 void *malloc(size_t);
 void *calloc (size_t nmemb, size_t size);
@@ -28,3 +32,5 @@ void dmalloc_initialize(void);
 #ifdef DEBUG
 void dmalloc_status(void);
 #endif
+
+#endif