diff --git a/src/gallium/frontends/osmesa/osmesa.c b/src/gallium/frontends/osmesa/osmesa.c
index c1b69e339da..1682a30c3d7 100644
--- a/src/gallium/frontends/osmesa/osmesa.c
+++ b/src/gallium/frontends/osmesa/osmesa.c
@@ -313,9 +313,8 @@ osmesa_choose_format(GLenum format, GLenum type)
          return PIPE_FORMAT_NONE;
       return PIPE_FORMAT_B5G6R5_UNORM;
    default:
-      FALLTHROUGH;
+      return PIPE_FORMAT_NONE;
    }
-   return PIPE_FORMAT_NONE;
 }