diff --git a/src/video/nanox/SDL_nximage.c b/src/video/nanox/SDL_nximage.c
index 5847bf46a..3dde16760 100644
--- a/src/video/nanox/SDL_nximage.c
+++ b/src/video/nanox/SDL_nximage.c
@@ -26,6 +26,7 @@
 */
 
 #include <stdlib.h>
+#include <string.h>
 
 #include "SDL_error.h"
 
diff --git a/src/video/nanox/SDL_nxvideo.c b/src/video/nanox/SDL_nxvideo.c
index 4f2a21ece..0e63b7d39 100644
--- a/src/video/nanox/SDL_nxvideo.c
+++ b/src/video/nanox/SDL_nxvideo.c
@@ -26,6 +26,7 @@
 */
 
 #include <stdlib.h>
+#include <string.h>
 
 #include "SDL_video.h"
 #include "SDL_pixels_c.h"