diff --git a/src/threads/fixed-point.h b/src/threads/fixed-point.h
index 0270b55..c6872cf 100644
--- a/src/threads/fixed-point.h
+++ b/src/threads/fixed-point.h
@@ -4,7 +4,7 @@
 /* Fixed Point Arithmetic bit count constants */
 #define NUM_INT_BITS 11
 #define NUM_FRAC_BITS 20
-#define CONVERSION_CONST 1 << NUM_FRAC_BITS /* f = 2^q, (2^20) */
+#define CONVERSION_CONST (1 << NUM_FRAC_BITS) /* f = 2^q, (2^20) */
 
 /* Fixed Point Arithmetic conversion operations */
 #define INT_TO_FP(n) ((n) * (CONVERSION_CONST))