1 files changed, 3 insertions, 0 deletions
diff --git a/unmime.c b/unmime.c
index 753c9aa1..bbdc7591 100644
--- a/unmime.c
+++ b/unmime.c
@@ -344,6 +344,9 @@ int CheckContentType(char *CntType)
   char *p = CntType;
   int i;
 
+  /* If no Content-Type header, it isn't MIME - don't touch it */
+  if (CntType == NULL) return 0;
+
   /* Skip whitespace, if any */
   for (; isspace(*p); p++) ;