diff --git a/tasks/mruby_build.rake b/tasks/mruby_build.rake
index ff62f92b8..cd9f77fc4 100644
--- a/tasks/mruby_build.rake
+++ b/tasks/mruby_build.rake
@@ -99,7 +99,7 @@ module MRuby
     end
 
     def mrbcfile
-      exefile("build/host/bin/mrbc")
+      MRuby.targets['host'].exefile("build/host/bin/mrbc")
     end
 
     def compilers