diff --git a/arch/arm/src/lpc17xx_40xx/lpc176x_clockconfig.c b/arch/arm/src/lpc17xx_40xx/lpc176x_clockconfig.c
index 427c2677f76..ab8586b0099 100644
--- a/arch/arm/src/lpc17xx_40xx/lpc176x_clockconfig.c
+++ b/arch/arm/src/lpc17xx_40xx/lpc176x_clockconfig.c
@@ -223,7 +223,7 @@ void lpc17_40_clockconfig(void)
           regval |= BOARD_FLASHCFG_VALUE;
         }
 
-      putreg32(BOARD_FLASHCFG_VALUE, LPC17_40_SYSCON_FLASHCFG);
+      putreg32(regval, LPC17_40_SYSCON_FLASHCFG);
     }
 #endif
 }