2 files changed, 2 insertions, 2 deletions
diff --git a/Parser/grammar1.c b/Parser/grammar1.c
index e0b8fbb..c702040 100644
--- a/Parser/grammar1.c
+++ b/Parser/grammar1.c
@@ -41,7 +41,7 @@ PyGrammar_LabelRepr(label *lb)
         }
     }
     else {
-        Py_FatalError("invalid label");
+        Py_FatalError("invalid grammar label");
         return NULL;
     }
 }
diff --git a/Parser/tokenizer.c b/Parser/tokenizer.c
index 75e8da4..c650442 100644
--- a/Parser/tokenizer.c
+++ b/Parser/tokenizer.c
@@ -1032,7 +1032,7 @@ tok_backup(struct tok_state *tok, int c)
 {
     if (c != EOF) {
         if (--tok->cur < tok->buf) {
-            Py_FatalError("beginning of buffer");
+            Py_FatalError("tokenizer beginning of buffer");
         }
         if (*tok->cur != c) {
             *tok->cur = c;