diff --git a/cpu/arm1136/omap24xx/interrupts.c b/cpu/arm1136/omap24xx/interrupts.c
old mode 100644
new mode 100755
index 5963d621bd..8503b24a8e
--- a/cpu/arm1136/omap24xx/interrupts.c
+++ b/cpu/arm1136/omap24xx/interrupts.c
@@ -37,7 +37,7 @@
 #define TIMER_LOAD_VAL 0
 
 /* macro to read the 32 bit timer */
-#define READ_TIMER (*volatile ulong*(CFG_TIMERBASE+TCRR))
+#define READ_TIMER (*((volatile ulong*)(CFG_TIMERBASE+TCRR)))
 
 static ulong timestamp;
 static ulong lastinc;