1 files changed, 2 insertions, 0 deletions
diff --git a/src/init.c b/src/init.c
index 17ce24313..1f7d4d364 100644
--- a/src/init.c
+++ b/src/init.c
@@ -57,7 +57,9 @@ mrb_init_core(mrb_state *mrb)
   mrb_init_exception(mrb);
   mrb_init_print(mrb);
   mrb_init_time(mrb);
+#ifdef INCLUDE_MATH
   mrb_init_math(mrb);
+#endif
 
   mrb_init_mrblib(mrb);