diff --git a/js/src/configure.in b/js/src/configure.in
index 03610e2a9868..52bbc3cffa7e 100644
--- a/js/src/configure.in
+++ b/js/src/configure.in
@@ -5044,6 +5044,12 @@ for lib_arg in $NSPR_LIBS $TK_LIBS; do
 done
 AC_SUBST(LIBS_PATH)
 
+dnl ========================================================
+dnl JavaScript shell
+dnl ========================================================
+
+AC_HAVE_FUNCS(setlocale)
+
 dnl ========================================================
 dnl Use cygwin wrapper for win32 builds, except MSYS/MinGW
 dnl ========================================================
diff --git a/js/src/js.cpp b/js/src/js.cpp
index 88c016d6c1fc..5a0880496fd8 100644
--- a/js/src/js.cpp
+++ b/js/src/js.cpp
@@ -3973,7 +3973,7 @@ main(int argc, char **argv, char **envp)
 #endif /* JSDEBUGGER */
 
     CheckHelpMessages();
-#ifndef WINCE
+#ifdef HAVE_SETLOCALE
     setlocale(LC_ALL, "");
 #endif
     gStackBase = (jsuword)&stackDummy;