diff --git a/arch/arm/src/sam34/sam4l_clockconfig.c b/arch/arm/src/sam34/sam4l_clockconfig.c
index 96070331ee..77efe7b396 100644
--- a/arch/arm/src/sam34/sam4l_clockconfig.c
+++ b/arch/arm/src/sam34/sam4l_clockconfig.c
@@ -920,6 +920,8 @@ static inline void sam_setdividers(void)
  *
  ****************************************************************************/
 
+#if BOARD_CPU_FREQUENCY > FLASH_MAXFREQ_PS1_HSDIS_FWS0 && \
+    BOARD_CPU_FREQUENCY <= FLASH_MAXFREQ_PS1_HSDIS_FWS1
 static inline void sam_enable_fastwakeup(void)
 {
   uint32_t regval;
@@ -930,6 +932,7 @@ static inline void sam_enable_fastwakeup(void)
           SAM_BPM_UNLOCK);
   putreg32(regval, SAM_BPM_PMCON);
 }
+#endif
 
 /****************************************************************************
  * Name: set_flash_waitstate