diff --git a/ext/random/php_random.h b/ext/random/php_random.h
index 6a8b0eb84a704..08517ad70286d 100644
--- a/ext/random/php_random.h
+++ b/ext/random/php_random.h
@@ -31,6 +31,8 @@
 #ifndef PHP_RANDOM_H
 # define PHP_RANDOM_H
 
+# include "php.h"
+
 PHPAPI double php_combined_lcg(void);
 
 /*