diff --git a/ext/mysql2/result.c b/ext/mysql2/result.c
index 894497ab3..4842b554e 100644
--- a/ext/mysql2/result.c
+++ b/ext/mysql2/result.c
@@ -1,4 +1,5 @@
 #include <mysql2_ext.h>
+#include <stdint.h>
 
 #ifdef HAVE_RUBY_ENCODING_H
 static rb_encoding *binaryEncoding;