diff --git a/c-programming/math/opt_int_div.h b/c-programming/math/opt_int_div.h
index 12d5157..ca23cf0 100644
--- a/c-programming/math/opt_int_div.h
+++ b/c-programming/math/opt_int_div.h
@@ -16,7 +16,7 @@
 // constants
 #define OPT_INT_DIV_ROUNDING                                                  \
     /* 10^OPT_INT_DIV_TEST_PRECISION */                                       \
-    powl(10.l, (long double) OPT_INT_DIV_TEST_PRECISION)                      \
+    powl(10.l, (long double) OPT_INT_DIV_TEST_PRECISION)
 
 // helper functions
 #define INT_BIN_DIV(a, b) ((a) >> (uintmax_t) log2l((b)))