diff --git a/src/array.c b/src/array.c
index 90a608b70a..4e6dbcceb6 100644
--- a/src/array.c
+++ b/src/array.c
@@ -4,6 +4,7 @@
 ** See Copyright Notice in mruby.h
 */
 
+#include <limits.h>
 #include "mruby.h"
 #include "mruby/array.h"
 #include "mruby/class.h"
diff --git a/src/dump.c b/src/dump.c
index b9e02fe771..92be11c416 100644
--- a/src/dump.c
+++ b/src/dump.c
@@ -6,6 +6,7 @@
 
 #include <ctype.h>
 #include <string.h>
+#include <limits.h>
 #include "mruby/dump.h"
 #include "mruby/string.h"
 #include "mruby/irep.h"
diff --git a/src/gc.c b/src/gc.c
index e87ed3f067..b3a9129533 100644
--- a/src/gc.c
+++ b/src/gc.c
@@ -6,6 +6,7 @@
 
 #include <string.h>
 #include <stdlib.h>
+#include <limits.h>
 #include "mruby.h"
 #include "mruby/array.h"
 #include "mruby/class.h"
diff --git a/src/pool.c b/src/pool.c
index 4d8c42dd1d..d539eae923 100644
--- a/src/pool.c
+++ b/src/pool.c
@@ -7,6 +7,7 @@
 #include <stddef.h>
 #include <stdint.h>
 #include <string.h>
+#include <limits.h>
 #include "mruby.h"
 
 /* configuration section */