diff --git a/ext/hash/php_hash_gost.h b/ext/hash/php_hash_gost.h
index 537e3d0bdc7..987eb655cb3 100644
--- a/ext/hash/php_hash_gost.h
+++ b/ext/hash/php_hash_gost.h
@@ -22,7 +22,7 @@
 /* GOST context */
 typedef struct {
 	uint32_t state[16];
-	size_t count[2];
+	uint32_t count[2];
 	unsigned char length;
 	unsigned char buffer[32];
 	const uint32_t (*tables)[4][256];