1 files changed, 2 insertions, 2 deletions
diff --git a/error.c b/error.c
index 2aa5169c2b..52ff87bc0f 100644
--- a/error.c
+++ b/error.c
@@ -53,8 +53,8 @@ int rb_str_end_with_asciichar(VALUE str, int c);
 VALUE rb_eEAGAIN;
 VALUE rb_eEWOULDBLOCK;
 VALUE rb_eEINPROGRESS;
-VALUE rb_mWarning;
-VALUE rb_cWarningBuffer;
+static VALUE rb_mWarning;
+static VALUE rb_cWarningBuffer;
 
 static ID id_warn;