diff --git a/src/RagePhoto-Extract.c b/src/RagePhoto-Extract.c
index c5a9a20..d0a1d22 100644
--- a/src/RagePhoto-Extract.c
+++ b/src/RagePhoto-Extract.c
@@ -17,6 +17,7 @@
 *****************************************************************************/
 
 #include "RagePhotoC.h"
+#include <stdio.h>
 
 int main(int argc, char *argv[])
 {
diff --git a/src/RagePhotoC.h b/src/RagePhotoC.h
index aa36ebf..8a19dfe 100644
--- a/src/RagePhotoC.h
+++ b/src/RagePhotoC.h
@@ -21,8 +21,8 @@
 
 #include "RagePhotoLibrary.h"
 #include "RagePhotoTypedefs.h"
+#include <stddef.h>
 #include <stdint.h>
-#include <stdio.h>
 
 #ifdef LIBRAGEPHOTO_C_NOAPI
 #error "libragephoto was built without C API"
diff --git a/src/RagePhotoTypedefs.h b/src/RagePhotoTypedefs.h
index 0657182..c2a6745 100644
--- a/src/RagePhotoTypedefs.h
+++ b/src/RagePhotoTypedefs.h
@@ -19,6 +19,7 @@
 #ifndef RAGEPHOTOTYPEDEFS_H
 #define RAGEPHOTOTYPEDEFS_H
 
+#include <stddef.h>
 #include <stdint.h>
 
 #ifdef __cplusplus