1 files changed, 1 insertions, 1 deletions
diff --git a/re.c b/re.c
index 309b9ef578..d63ae67eea 100644
--- a/re.c
+++ b/re.c
@@ -1216,7 +1216,7 @@ rb_reg_s_quote(argc, argv)
 	  case '(': case ')': case '|': case '-':
 	  case '*': case '.': case '\\':
 	  case '?': case '+': case '^': case '$':
-	  case ' ':
+	  case ' ': case '#':
 	    *t++ = '\\';
 	    break;
 	}