diff --git a/CubeModLauncher/main.cpp b/CubeModLauncher/main.cpp
index afa089f..d9cc518 100644
--- a/CubeModLauncher/main.cpp
+++ b/CubeModLauncher/main.cpp
@@ -9,7 +9,7 @@ char* MODLOADER_DLL = "CubeModLoader.dll";
 
 using namespace std;
 
-bool FileExists(char* fileName) {
+bool FileExists(const char* fileName) {
     DWORD dwAttrib = GetFileAttributes(fileName);
     return (dwAttrib != INVALID_FILE_ATTRIBUTES && !(dwAttrib & FILE_ATTRIBUTE_DIRECTORY));
 }
diff --git a/CubeModLauncher/main.h b/CubeModLauncher/main.h
index b204edf..689df4a 100644
--- a/CubeModLauncher/main.h
+++ b/CubeModLauncher/main.h
@@ -1,7 +1,7 @@
 #ifndef MAIN_H_INCLUDED
 #define MAIN_H_INCLUDED
 
-bool FileExists(char* fileName);
+bool FileExists(const char* fileName);
 int Bail(int result);
 int main(int argc, char** argv);