2 files changed, 3 insertions, 3 deletions

diff --git a/cgit.c b/cgit.c
index e46c00a..9305d0a 100644
--- a/cgit.c
+++ b/cgit.c
@@ -261,5 +261,5 @@ char *xstrdupn(const char *str)
 static void prepare_context(struct cgit_context *ctx)
 {
-        memset(ctx, 0, sizeof(ctx));
+        memset(ctx, 0, sizeof(*ctx));
         ctx->cfg.agefile = "info/web/last-modified";
         ctx->cfg.nocache = 0;
diff --git a/ui-shared.c b/ui-shared.c
index 08ea003..8827fff 100644
--- a/ui-shared.c
+++ b/ui-shared.c
@@ -247,5 +247,5 @@ static void reporevlink(char *page, char *name, char *title, char *class,
 
         delim = repolink(title, class, page, head, path);
-        if (rev && strcmp(rev, ctx.qry.head)) {
+        if (rev && ctx.qry.head != NULL && strcmp(rev, ctx.qry.head)) {
                 html(delim);
                 html("id=");
@@ -364,5 +364,5 @@ void cgit_diff_link(char *name, char *title, char *class, char *head,
 
         delim = repolink(title, class, "diff", head, path);
-        if (new_rev && strcmp(new_rev, ctx.qry.head)) {
+        if (new_rev && ctx.qry.head != NULL && strcmp(new_rev, ctx.qry.head)) {
                 html(delim);
                 html("id=");