diff --git a/mrbgems/mruby-range-ext/src/range.c b/mrbgems/mruby-range-ext/src/range.c
index 3131192ff..aca71cc01 100644
--- a/mrbgems/mruby-range-ext/src/range.c
+++ b/mrbgems/mruby-range-ext/src/range.c
@@ -1,7 +1,6 @@
 #include <mruby.h>
 #include <mruby/range.h>
 #include <math.h>
-#include <float.h>
 
 static mrb_bool
 r_le(mrb_state *mrb, mrb_value a, mrb_value b)