diff --git a/hyperroid/app/src/main/jni/hyper.cpp b/hyperroid/app/src/main/jni/hyper.cpp
index f691cfcb..2574a2de 100644
--- a/hyperroid/app/src/main/jni/hyper.cpp
+++ b/hyperroid/app/src/main/jni/hyper.cpp
@@ -27,7 +27,8 @@ void gdpush(int t);
 void shareScore(MOBPAR_FORMAL);
 
 const char *scorefile, *conffile;
-string levelfile, picfile;
+#include <string>
+std::string levelfile, picfile;
 
 bool settingsChanged = false;