diff --git a/components/driver/test/test_rmt.c b/components/driver/test/test_rmt.c
index de9937e3a..9ee803dd9 100644
--- a/components/driver/test/test_rmt.c
+++ b/components/driver/test/test_rmt.c
@@ -88,7 +88,7 @@ static void fill_item_end(rmt_item32_t* item)
 /**
  * @brief Check whether duration is around target_us
  */
-inline bool check_in_range(int duration_ticks, int target_us, int margin_us)
+static inline bool check_in_range(int duration_ticks, int target_us, int margin_us)
 {
     if(( ITEM_DURATION(duration_ticks) < (target_us + margin_us))
         && ( ITEM_DURATION(duration_ticks) > (target_us - margin_us))) {
diff --git a/components/ethernet/emac_dev.h b/components/ethernet/emac_dev.h
index 86202e121..73bb627d0 100644
--- a/components/ethernet/emac_dev.h
+++ b/components/ethernet/emac_dev.h
@@ -54,54 +54,54 @@ void emac_enable_flowctrl(void);
 void emac_disable_flowctrl(void);
 void emac_mac_enable_txrx(void);
 
-uint32_t inline emac_read_tx_cur_reg(void)
+static inline uint32_t emac_read_tx_cur_reg(void)
 {
     return REG_READ(EMAC_DMATXCURRDESC_REG);
 }
 
-uint32_t inline emac_read_rx_cur_reg(void)
+static inline uint32_t emac_read_rx_cur_reg(void)
 {
     return REG_READ(EMAC_DMARXCURRDESC_REG);
 }
 
-void inline emac_poll_tx_cmd(void)
+static inline void emac_poll_tx_cmd(void)
 {
     //write any to wake up dma
     REG_WRITE(EMAC_DMATXPOLLDEMAND_REG, 1);
 }
 
-void inline emac_poll_rx_cmd(void)
+static inline void emac_poll_rx_cmd(void)
 {
     //write any to wake up dma
     REG_WRITE(EMAC_DMARXPOLLDEMAND_REG, 1);
 }
 
-void inline emac_disable_rx_intr(void)
+static inline void emac_disable_rx_intr(void)
 {
     REG_CLR_BIT(EMAC_DMAIN_EN_REG, EMAC_DMAIN_RIE);
 }
 
-void inline emac_enable_rx_intr(void)
+static inline void emac_enable_rx_intr(void)
 {
     REG_SET_BIT(EMAC_DMAIN_EN_REG, EMAC_DMAIN_RIE);
 }
 
-void inline emac_disable_rx_unavail_intr(void)
+static inline void emac_disable_rx_unavail_intr(void)
 {
     REG_CLR_BIT(EMAC_DMAIN_EN_REG, EMAC_DMAIN_RBUE);
 }
 
-void inline emac_enable_rx_unavail_intr(void)
+static inline void emac_enable_rx_unavail_intr(void)
 {
     REG_SET_BIT(EMAC_DMAIN_EN_REG, EMAC_DMAIN_RBUE);
 }
 
-void IRAM_ATTR inline emac_send_pause_frame_enable(void)
+static inline void IRAM_ATTR emac_send_pause_frame_enable(void)
 {
     REG_SET_BIT(EMAC_EX_PHYINF_CONF_REG, EMAC_EX_SBD_FLOWCTRL);
 }
 
-void inline emac_send_pause_zero_frame_enable(void)
+static inline void emac_send_pause_zero_frame_enable(void)
 {
     REG_CLR_BIT(EMAC_EX_PHYINF_CONF_REG, EMAC_EX_SBD_FLOWCTRL);
 }