diff --git a/src/playlist/plugins/SoundCloudPlaylistPlugin.cxx b/src/playlist/plugins/SoundCloudPlaylistPlugin.cxx
index 1c6e58ac6..0d3f0fb8b 100644
--- a/src/playlist/plugins/SoundCloudPlaylistPlugin.cxx
+++ b/src/playlist/plugins/SoundCloudPlaylistPlugin.cxx
@@ -94,7 +94,7 @@ enum key {
 	Other,
 };
 
-const char* key_str[] = {
+static const char *const key_str[] = {
 	"duration",
 	"title",
 	"stream_url",