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-rw-r--r--blink/util.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/blink/util.c b/blink/util.c
index 6547368..3bf17b1 100644
--- a/blink/util.c
+++ b/blink/util.c
@@ -24,7 +24,7 @@
#include "util.h"
#if defined(CLKPR)
-#define CPU_PRESCALE(n) (CLKPR = 0x80, CLKPR = (n))
+#define CPU_PRESCALE(n) do { CLKPR = 0x80; CLKPR = (n); } while(0)
#else
#define CPU_PRESCALE(n)
#endif