diff --git a/pdfgen.c b/pdfgen.c
index 7e91b33..6b94202 100644
--- a/pdfgen.c
+++ b/pdfgen.c
@@ -113,12 +113,12 @@ typedef SSIZE_T ssize_t;
 #include <ctype.h>
 #include <errno.h>
 #include <inttypes.h>
+#include <limits.h>
 #include <locale.h>
 #include <math.h>
 #include <stdarg.h>
 #include <stdbool.h>
 #include <stddef.h>
-#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>