diff --git a/desmume/src/movie.cpp b/desmume/src/movie.cpp
index 1461e9cc4..397a9f56e 100644
--- a/desmume/src/movie.cpp
+++ b/desmume/src/movie.cpp
@@ -850,7 +850,7 @@ void LoadFM2_binarychunk(MovieData& movieData, std::istream* fp, int size)
 
 #include <sstream>
 
-bool CheckFileExists(const char* filename)
+static bool CheckFileExists(const char* filename)
 {
 	//This function simply checks to see if the given filename exists
 	string checkFilename;