diff --git a/c-programming/math/opt_int_div.h b/c-programming/math/opt_int_div.h
index 24e594f..2a15fb2 100644
--- a/c-programming/math/opt_int_div.h
+++ b/c-programming/math/opt_int_div.h
@@ -44,9 +44,9 @@
         (roundl(fmodl(log2l(INT_ABS((b))), 1.l) * OPT_INT_DIV_ROUNDING)       \
          == 0.l) ? (                                                          \
             INT_DIV_NEG_RESULT_SIGN(a, b) ?                                   \
-                -INT_BIN_DIV(INT_ABS(a), INT_ABS(b))                          \
+                -INT_BIN_DIV(INT_ABS((a)), INT_ABS((b)))                      \
             :                                                                 \
-                INT_BIN_DIV(INT_ABS(a), INT_ABS(b)))                          \
+                INT_BIN_DIV(INT_ABS((a)), INT_ABS((b))))                      \
         :                                                                     \
             ((a) / (b)) ))                                                    \
     ) /* end */