# Revision history [back]

### How to install ignition-math3 on Windows 10?

I am follwoing the guide http://gazebosim.org/tutorials?tut=install_on_windows. When trying to follow step 10 I get the error:

-- BUILD ERRORS: These must be resolved before compiling.
--      Missing: Ignition math3 library.
-- END BUILD ERRORS


From the output of step 9 I can see that it installs Ignition math4 instead og Ignition math3. How do I fix this?