2 files changed, 2 insertions, 2 deletions

diff --git a/firmware/include/stdlib.h b/firmware/include/stdlib.h
index 0074fe65e5..1f4fb88668 100644
--- a/firmware/include/stdlib.h
+++ b/firmware/include/stdlib.h
@@ -17,7 +17,7 @@ extern "C" {
 #include <stddef.h>
 
 #ifndef NULL
-#define NULL 0
+#define NULL ((void*)0)
 #endif
 
 #define EXIT_FAILURE 1
diff --git a/firmware/include/string.h b/firmware/include/string.h
index 713a875698..32b86cd2b0 100644
--- a/firmware/include/string.h
+++ b/firmware/include/string.h
@@ -17,7 +17,7 @@ extern "C" {
 #include <stddef.h>
 
 #ifndef NULL
-#define NULL 0
+#define NULL ((void*)0)
 #endif
 
 _PTR     _EXFUN(memchr,(const _PTR, int, size_t));