diff --git a/c-programming/math/opt_int_div.h b/c-programming/math/opt_int_div.h
index 10a83fc..3950600 100644
--- a/c-programming/math/opt_int_div.h
+++ b/c-programming/math/opt_int_div.h
@@ -34,8 +34,7 @@
         /* */                                                                 \
         /* formula: round(log_2(b) % 1, OPT_INT_DIV_TEST_PRECISION digits */  \
         /* after point) == 0                                              */  \
-        (roundl(fmodl(log2l((b)), 1.l) * OPT_INT_DIV_ROUNDING) /              \
-         OPT_INT_DIV_ROUNDING == 0.l) ? (                                     \
+        (roundl(fmodl(log2l((b)), 1.l) * OPT_INT_DIV_ROUNDING) == 0.l) ? (    \
             /* if only one of the numbers is negative, the result is */       \
             /* negative */                                                    \
             INT_DIV_NEG_RESULT_SIGN(a, b) ?                                   \