diff --git a/.gitignore b/.gitignore
index 8c6a1ef55..31d38e66c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -97,3 +97,5 @@ xcuserdata/
 *.xccheckout
 *.xcscmblueprin
 
+# This is left over when building fish 3
+muparser-*/