diff --git a/components/crashcatcher/windows_crashmonitor.cpp b/components/crashcatcher/windows_crashmonitor.cpp
index 214557e3a7..c91f57c6f9 100644
--- a/components/crashcatcher/windows_crashmonitor.cpp
+++ b/components/crashcatcher/windows_crashmonitor.cpp
@@ -225,7 +225,7 @@ namespace Crash
         signalApp();
     }
 
-    std::wstring utf8ToUtf16(const std::string& utf8)
+    static std::wstring utf8ToUtf16(const std::string& utf8)
     {
         const int nLenWide = MultiByteToWideChar(CP_UTF8, 0, utf8.c_str(), utf8.size(), nullptr, 0);