Index: src/OFHTTPClient.m
==================================================================
--- src/OFHTTPClient.m
+++ src/OFHTTPClient.m
@@ -489,11 +489,12 @@
 		} @catch (OFInvalidEncodingException *e) {
 			@throw [OFInvalidServerReplyException exception];
 		}
 	}
 
-	if (![line hasPrefix: @"HTTP/"] || [line characterAtIndex: 8] != ' ')
+	if (![line hasPrefix: @"HTTP/"] || [line length] < 9 ||
+	    [line characterAtIndex: 8] != ' ')
 		@throw [OFInvalidServerReplyException exception];
 
 	version = [line substringWithRange: of_range(5, 3)];
 	if (![version isEqual: @"1.0"] && ![version isEqual: @"1.1"])
 		@throw [OFUnsupportedVersionException