diff --git a/CLI/Repl.cpp b/CLI/Repl.cpp
index 4cb2234..83060f5 100644
--- a/CLI/Repl.cpp
+++ b/CLI/Repl.cpp
@@ -21,6 +21,8 @@
 #include <fcntl.h>
 #endif
 
+#include <locale.h>
+
 LUAU_FASTFLAG(DebugLuauTimeTracing)
 
 enum class CliMode
@@ -435,6 +437,9 @@ static void runReplImpl(lua_State* L)
 {
     ic_set_default_completer(completeRepl, L);
 
+    // Reset the locale to C
+    setlocale(LC_ALL, "C");
+
     // Make brace matching easier to see
     ic_style_def("ic-bracematch", "teal");