diff --git a/arch/arm/src/kinetis/kinetis_dma.c b/arch/arm/src/kinetis/kinetis_dma.c
index 2f4a83feea6..c79dcd99fb4 100644
--- a/arch/arm/src/kinetis/kinetis_dma.c
+++ b/arch/arm/src/kinetis/kinetis_dma.c
@@ -79,13 +79,13 @@
 
  struct kinetis_dma_ch
  {
-    bool                    used;
-    uint8_t                 ind;
-    uint8_t                 irq;
-    kinetis_dma_direction_t dir;
-    kinetis_dma_data_sz_t   data_sz;
-    dma_callback_t          callback;
-    void                    *arg;
+    bool used;
+    uint8_t ind;
+    uint8_t irq;
+    enum kinetis_dma_direction_e dir;
+    enum kinetis_dma_data_sz_e data_sz;
+    dma_callback_t callback;
+    void *arg;
  };
 
 /****************************************************************************
@@ -239,8 +239,8 @@ void weak_function up_dmainitialize(void)
  ****************************************************************************/
 
 DMA_HANDLE kinetis_dmachannel(uint8_t src, uint32_t per_addr,
-                              kinetis_dma_data_sz_t per_data_sz,
-                              kinetis_dma_direction_t dir)
+                              enum kinetis_dma_data_sz_e per_data_sz,
+                              enum kinetis_dma_direction_e dir)
 {
   int i;
   int ch_ind;
diff --git a/arch/arm/src/kinetis/kinetis_dma.h b/arch/arm/src/kinetis/kinetis_dma.h
index 7637ec3df3a..64ada268010 100644
--- a/arch/arm/src/kinetis/kinetis_dma.h
+++ b/arch/arm/src/kinetis/kinetis_dma.h
@@ -87,20 +87,20 @@ struct kinetis_dmaregs_s
 };
 #endif
 
-typedef enum _kinetis_dma_direction_e
+enum kinetis_dma_direction_e
 {
   KINETIS_DMA_DIRECTION_PERIPHERAL_TO_MEMORY,
   KINETIS_DMA_DIRECTION_MEMORY_TO_PERIPHERAL
-} kinetis_dma_direction_t;
+};
 
 /* Kinetis data transfer size */
 
-typedef enum _kinetis_dma_data_sz_e
+enum kinetis_dma_data_sz_e
 {
   KINETIS_DMA_DATA_SZ_8BIT = 0,
   KINETIS_DMA_DATA_SZ_16BIT = 1,
   KINETIS_DMA_DATA_SZ_32BIT = 2,
-} kinetis_dma_data_sz_t;
+};
 
 /****************************************************************************
  * Public Data
@@ -158,8 +158,8 @@ void kinetis_dmainitialize(void);
 
 DMA_HANDLE kinetis_dmachannel(uint8_t src,
                               uint32_t per_addr,
-                              kinetis_dma_data_sz_t per_data_sz,
-                              kinetis_dma_direction_t dir);
+                              enum kinetis_dma_data_sz_e per_data_sz,
+                              enum kinetis_dma_direction_e dir);
 
 /****************************************************************************
  * Name: kinetis_dmafree