1 files changed, 7 insertions, 3 deletions
diff --git a/src/pj_gridinfo.c b/src/pj_gridinfo.c
index 442b3fe6..f201f39e 100644
--- a/src/pj_gridinfo.c
+++ b/src/pj_gridinfo.c
@@ -28,11 +28,15 @@
 
 #define PJ_LIB__
 
+#include <errno.h>
+#include <math.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
 #include "proj_internal.h"
 #include "projects.h"
-#include <string.h>
-#include <math.h>
-#include <errno.h>
 
 /************************************************************************/
 /*                             swap_words()                             */