diff --git a/CMakeLists.txt b/CMakeLists.txt
index bd6d847..3d23559 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,6 +5,7 @@ list(APPEND SOURCES src/esp_littlefs.c src/littlefs_esp_part.c src/lfs_config.c)
 
 if(CONFIG_LITTLEFS_SDMMC_SUPPORT)
     list(APPEND SOURCES src/littlefs_sdmmc.c)
+    list(APPEND pub_requires sdmmc)
 endif()
 
 if(IDF_VERSION_MAJOR GREATER_EQUAL 5)
@@ -12,7 +13,7 @@ if(IDF_VERSION_MAJOR GREATER_EQUAL 5)
 else()
     list(APPEND pub_requires spi_flash)
 endif()
-list(APPEND priv_requires esptool_py spi_flash vfs sdmmc)
+list(APPEND priv_requires esptool_py spi_flash vfs)
 
 idf_component_register(
     SRCS ${SOURCES}
diff --git a/include/esp_littlefs.h b/include/esp_littlefs.h
index 101445a..ad4fbe5 100644
--- a/include/esp_littlefs.h
+++ b/include/esp_littlefs.h
@@ -19,6 +19,11 @@ extern "C" {
 #define ESP_LITTLEFS_VERSION_MINOR 16
 #define ESP_LITTLEFS_VERSION_PATCH 2
 
+#ifdef ESP8266
+// ESP8266 RTOS SDK default enables VFS DIR support
+#define CONFIG_VFS_SUPPORT_DIR 1
+#endif
+
 #if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(4, 4, 2) && CONFIG_VFS_SUPPORT_DIR
 #define ESP_LITTLEFS_ENABLE_FTRUNCATE
 #endif // ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(4, 4, 2)
diff --git a/src/esp_littlefs.c b/src/esp_littlefs.c
index ebc7a88..711dc10 100644
--- a/src/esp_littlefs.c
+++ b/src/esp_littlefs.c
@@ -899,13 +899,21 @@ static int esp_littlefs_flags_conv(int m) {
 
 static void esp_littlefs_take_efs_lock(void) {
     if( _efs_lock == NULL ){
+#ifdef ESP8266
+        taskENTER_CRITICAL();
+#else
         static portMUX_TYPE mux = portMUX_INITIALIZER_UNLOCKED;
         portENTER_CRITICAL(&mux);
+#endif
         if( _efs_lock == NULL ){
             _efs_lock = xSemaphoreCreateMutex();
             assert(_efs_lock);
         }
+#ifdef ESP8266
+        taskEXIT_CRITICAL();
+#else
         portEXIT_CRITICAL(&mux);
+#endif
     }
 
     xSemaphoreTake(_efs_lock, portMAX_DELAY);