diff --git a/audio/out/ao_coreaudio_exclusive.c b/audio/out/ao_coreaudio_exclusive.c
index d4e66b73e3..5e0ec3b19f 100644
--- a/audio/out/ao_coreaudio_exclusive.c
+++ b/audio/out/ao_coreaudio_exclusive.c
@@ -114,7 +114,7 @@ static OSStatus enable_property_listener(struct ao *ao, bool enabled)
                             kAudioHardwarePropertyDevices};
     AudioDeviceID devs[] = {p->device,
                             kAudioObjectSystemObject};
-    assert(MP_ARRAY_SIZE(selectors) == MP_ARRAY_SIZE(devs));
+    static_assert(MP_ARRAY_SIZE(selectors) == MP_ARRAY_SIZE(devs), "");
 
     OSStatus status = noErr;
     for (int n = 0; n < MP_ARRAY_SIZE(devs); n++) {
diff --git a/options/m_option.c b/options/m_option.c
index 02dea2bf3c..66d68398f4 100644
--- a/options/m_option.c
+++ b/options/m_option.c
@@ -3792,7 +3792,7 @@ static void dup_node(void *ta_parent, struct mpv_node *node)
 
 static void copy_node(const m_option_t *opt, void *dst, const void *src)
 {
-    assert(sizeof(struct mpv_node) <= sizeof(union m_option_value));
+    static_assert(sizeof(struct mpv_node) <= sizeof(union m_option_value), "");
 
     if (!(dst && src))
         return;
diff --git a/osdep/io.c b/osdep/io.c
index d66160c0e7..4306a04a6d 100644
--- a/osdep/io.c
+++ b/osdep/io.c
@@ -189,7 +189,7 @@ static bool get_file_ids_win8(HANDLE h, dev_t *dev, ino_t *ino)
     // SDK, but we can ignore that by just memcpying it. This will also
     // truncate the file ID on 32-bit Windows, which doesn't support __int128.
     // 128-bit file IDs are only used for ReFS, so that should be okay.
-    assert(sizeof(*ino) <= sizeof(ii.FileId));
+    static_assert(sizeof(*ino) <= sizeof(ii.FileId), "");
     memcpy(ino, &ii.FileId, sizeof(*ino));
     return true;
 }
diff --git a/stream/stream_dvdnav.c b/stream/stream_dvdnav.c
index d858c51aca..5dba92ada5 100644
--- a/stream/stream_dvdnav.c
+++ b/stream/stream_dvdnav.c
@@ -497,7 +497,7 @@ static int control(stream_t *stream, int cmd, void *arg)
         struct stream_dvd_info_req *req = arg;
         memset(req, 0, sizeof(*req));
         req->num_subs = mp_dvdnav_number_of_subs(stream);
-        assert(sizeof(uint32_t) == sizeof(unsigned int));
+        static_assert(sizeof(uint32_t) == sizeof(unsigned int), "");
         memcpy(req->palette, priv->spu_clut, sizeof(req->palette));
         return STREAM_OK;
     }
diff --git a/sub/osd.c b/sub/osd.c
index 9d6926dcb6..d33aabdd53 100644
--- a/sub/osd.c
+++ b/sub/osd.c
@@ -119,7 +119,7 @@ bool osd_res_equals(struct mp_osd_res a, struct mp_osd_res b)
 
 struct osd_state *osd_create(struct mpv_global *global)
 {
-    assert(MAX_OSD_PARTS >= OSDTYPE_COUNT);
+    static_assert(MAX_OSD_PARTS >= OSDTYPE_COUNT, "");
 
     struct osd_state *osd = talloc_zero(NULL, struct osd_state);
     *osd = (struct osd_state) {