diff --git a/cgit.c b/cgit.c
index 8381630..3fcca2a 100644
--- a/cgit.c
+++ b/cgit.c
@@ -620,6 +620,16 @@ static void cgit_parse_args(int argc, const char **argv)
 		}
 		if (!strncmp(argv[i], "--scan-tree=", 12) ||
 		    !strncmp(argv[i], "--scan-path=", 12)) {
+			/* HACK: the global snapshot bitmask defines the
+			 * set of allowed snapshot formats, but the config
+			 * file hasn't been parsed yet so the mask is
+			 * currently 0. By setting all bits high before
+			 * scanning we make sure that any in-repo cgitrc
+			 * snapshot setting is respected by scan_tree().
+			 * BTW: we assume that there'll never be more than
+			 * 255 different snapshot formats supported by cgit...
+			 */
+			ctx.cfg.snapshots = 0xFF;
 			scan++;
 			scan_tree(argv[i] + 12, repo_config);
 		}