diff --git a/radio/src/thirdparty/libopenui/src/libopenui_helpers.h b/radio/src/thirdparty/libopenui/src/libopenui_helpers.h
index d93619683..db5911410 100644
--- a/radio/src/thirdparty/libopenui/src/libopenui_helpers.h
+++ b/radio/src/thirdparty/libopenui/src/libopenui_helpers.h
@@ -21,6 +21,7 @@
 #define _LIBOPEUI_HELPERS_H_
 
 #include <string>
+#include <cstring>
 
 #if defined(min)
   #undef min