diff --git a/c-programming/math/opt_int_div.h b/c-programming/math/opt_int_div.h
index 6b3a90c..24e594f 100644
--- a/c-programming/math/opt_int_div.h
+++ b/c-programming/math/opt_int_div.h
@@ -33,6 +33,10 @@
             /* the result is +/-1 */                                          \
             (INT_DIV_NEG_RESULT_SIGN(a, b) ? -1 : 1) : (                      \
                                                                               \
+        /* check if abs(a) < abs(b) */                                        \
+        INT_ABS((a)) < INT_ABS((b)) ?                                         \
+            0 : (                                                             \
+                                                                              \
         /* check if b is a power of 2 */                                      \
         /* */                                                                 \
         /* formula: round(log_2(b) % 1, OPT_INT_DIV_TEST_PRECISION digits */  \
@@ -44,5 +48,5 @@
             :                                                                 \
                 INT_BIN_DIV(INT_ABS(a), INT_ABS(b)))                          \
         :                                                                     \
-            ((a) / (b)) )                                                     \
+            ((a) / (b)) ))                                                    \
     ) /* end */