diff --git a/firmware/applications/iggy.c b/firmware/applications/iggy.c
index 97b03b4..6523f0a 100644
--- a/firmware/applications/iggy.c
+++ b/firmware/applications/iggy.c
@@ -142,7 +142,7 @@ void main_iggy(void) {
 	    gpioSetValue (RB_LCD_BL, 0); 
 	    SCB_SCR |= SCB_SCR_SLEEPDEEP;
 	    PMU_PMUCTRL = PMU_PMUCTRL_DPDEN_DEEPPOWERDOWN;
-#ifdef ARM
+#ifdef __arm__
 	    __asm volatile ("WFI");
 #endif
 	}else{
diff --git a/firmware/core/lpc134x.h b/firmware/core/lpc134x.h
index 5a7332e..96903ae 100644
--- a/firmware/core/lpc134x.h
+++ b/firmware/core/lpc134x.h
@@ -1937,7 +1937,7 @@ typedef struct
 
 #define NVIC                                      ((NVIC_Type *) NVIC_BASE_ADDRESS)
 
-#ifdef ARM
+#ifdef __arm__
 static inline void __enable_irq()                 { __asm volatile ("cpsie i"); }
 static inline void __disable_irq()                { __asm volatile ("cpsid i"); }
 #else