diff --git a/lib/lv_fs_if/lv_fs_pc.c b/lib/lv_fs_if/lv_fs_pc.c
index d32e1418..a9277cb0 100644
--- a/lib/lv_fs_if/lv_fs_pc.c
+++ b/lib/lv_fs_if/lv_fs_pc.c
@@ -302,6 +302,8 @@ static lv_fs_res_t fs_trunc(lv_fs_drv_t* drv, void* file_p)
 
     fflush(*fp); /*If not syncronized fclose can write the truncated part*/
     uint32_t p = ftell(*fp);
+    (void)p; // unused
+
     // ftruncate(fileno(*fp), p);
     return LV_FS_RES_OK;
 }