diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 36dac15..34d7801 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -23,4 +23,6 @@ jobs:
         run: ./configure --enable-alarm --enable-ansi_color --enable-color --enable-cookie --enable-external_uri_loader --enable-gopher --enable-image --enable-ipv6 --enable-m17n --enable-menu --enable-mouse --enable-nls --enable-nntp --enable-sslverify --enable-unicode --enable-w3mmailer --with-imagelib=imlib2 --with-migemo="cmigemo -q -d /usr/share/cmigemo/utf-8/migemo-dict" --with-ssl --with-gc
 
       - name: build
-        run: OPTS='-Wno-unused-result -Werror' make
+        # TODO(rkta): Remove -Wno-error=deprecated-declarations once support for
+        # OpenSSL 3.0 has arrived.
+        run: make OPTS='-Werror -Wno-error=deprecated-declarations -Wno-unused-result'
diff --git a/file.c b/file.c
index 371ca97..3d71a8d 100644
--- a/file.c
+++ b/file.c
@@ -8199,6 +8199,8 @@ save2tmp(URLFile uf, char *tmpf)
     int check = 0;
     if (uf.scheme == SCM_NEWS) {
 	char c;
+	if (!uf.stream)
+		return -1;
 	while (c = UFgetc(&uf), !iseos(uf.stream)) {
 	    if (c == '\n') {
 		if (check == 0)
diff --git a/rc.c b/rc.c
index 0460f9e..d9ab08d 100644
--- a/rc.c
+++ b/rc.c
@@ -1247,7 +1247,6 @@ static int
 do_recursive_mkdir(const char *dir)
 {
     char *ch, *dircpy, tmp;
-    size_t n;
     struct stat st;
 
     if (*dir == '\0')
diff --git a/table.c b/table.c
index 043df86..7479a82 100644
--- a/table.c
+++ b/table.c
@@ -3503,7 +3503,7 @@ correct_table_matrix4(struct table *t, int col, int cspan, char *flags,
 static void
 set_table_matrix0(struct table *t, int maxwidth)
 {
-    int size = t->maxcol + 1;
+    size_t size = t->maxcol + 1;
     int i, j, k, bcol, ecol;
     int width;
     double w0, w1, w, s, b;