diff --git a/devtools/create_mortdat/create_mortdat.cpp b/devtools/create_mortdat/create_mortdat.cpp
index 2f1539822da..eb476c187ae 100644
--- a/devtools/create_mortdat/create_mortdat.cpp
+++ b/devtools/create_mortdat/create_mortdat.cpp
@@ -130,7 +130,7 @@ int main(int argc, char *argv[]) {
 	}
 
 	mortCom.open(argv[1], kFileReadMode);
-	openOutputFile("mort.dat");
+	openOutputFile(MORT_DAT);
 
 	process();
 
diff --git a/devtools/create_mortdat/create_mortdat.h b/devtools/create_mortdat/create_mortdat.h
index c46ad8aa260..d9c7561d938 100644
--- a/devtools/create_mortdat/create_mortdat.h
+++ b/devtools/create_mortdat/create_mortdat.h
@@ -31,6 +31,8 @@ enum AccessMode {
 	kFileWriteMode = 2
 };
 
+#define MORT_DAT "mort.dat"
+
 class File {
 private:
 	FILE *f;