diff --git a/libffi.nimble b/libffi.nimble
index c33a7f7..f0d24e8 100644
--- a/libffi.nimble
+++ b/libffi.nimble
@@ -4,5 +4,8 @@ author        = "Andreas Rumpf"
 description   = "libffi wrapper for Nim."
 license       = "MIT"
 
+when defined(windows):
+  installExt     = @["nim", "c", "h", "s"]
+
 # Dependencies
 requires "nim >= 0.10.0"