1 files changed, 1 insertions, 0 deletions
diff --git a/complex.c b/complex.c
index ee281ba819..d32ecfd3ca 100644
--- a/complex.c
+++ b/complex.c
@@ -1906,6 +1906,7 @@ Init_Complex(void)
     rb_undef_method(rb_cComplex, "round");
     rb_undef_method(rb_cComplex, "step");
     rb_undef_method(rb_cComplex, "truncate");
+    rb_undef_method(rb_cComplex, "i");
 
 #if 0 /* NUBY */
     rb_undef_method(rb_cComplex, "//");