diff --git a/include/cpu_md5.h b/include/cpu_md5.h
index f973fd1f1..136a2dfcf 100644
--- a/include/cpu_md5.h
+++ b/include/cpu_md5.h
@@ -5,5 +5,7 @@
 
 #pragma once
 
+#include <string.h>
+
 void md5_64 (uint block[16], uint digest[4]);
 void md5_complete_no_limit (uint digest[4], uint *plain, uint plain_len);
diff --git a/src/cpu_md5.c b/src/cpu_md5.c
index 09e1b7122..88f3e4499 100644
--- a/src/cpu_md5.c
+++ b/src/cpu_md5.c
@@ -117,8 +117,6 @@ void md5_64 (u32 block[16], u32 digest[4])
 
 // only use this when really, really needed, SLOW
 
-#include <string.h>
-
 void md5_complete_no_limit (u32 digest[4], u32 *plain, u32 plain_len)
 {
   u32 a = MD5M_A;