diff --git a/library/havege.c b/library/havege.c
index c82a24e..de024de 100644
--- a/library/havege.c
+++ b/library/havege.c
@@ -149,7 +149,7 @@
     *C = (*C >> (15)) ^ (*C << (17)) ^ CLK;             \
     *D = (*D >> (16)) ^ (*D << (16)) ^ CLK;             \
                                                         \
-    PT1 = ( RES[(i - 8) ^ PTX] ^                        \
+    PT1 = ( RES[( i - 8 ) ^ PTX] ^                      \
             WALK[PT1 ^ PTX ^ 7] ) & (~1);               \
     PT1 ^= (PT2 ^ 0x10) & 0x10;                         \
                                                         \