diff --git a/Italic/Masters/SourceCodeVariable-Italic.designspace b/Italic/Masters/SourceCodeVariable-Italic.designspace
index 34af446660..b19af04d4f 100644
--- a/Italic/Masters/SourceCodeVariable-Italic.designspace
+++ b/Italic/Masters/SourceCodeVariable-Italic.designspace
@@ -13,6 +13,7 @@
     </axes>
     <sources>
         <source filename="master_0/SourceCode_ExtraLight-Italic.ufo" name="master_0">
+            <lib copy="1" />
             <location>
                 <dimension name="weight" xvalue="0" />
             </location>
diff --git a/Roman/Masters/SourceCodeVariable-Roman.designspace b/Roman/Masters/SourceCodeVariable-Roman.designspace
index db4764a643..9c11440e5f 100644
--- a/Roman/Masters/SourceCodeVariable-Roman.designspace
+++ b/Roman/Masters/SourceCodeVariable-Roman.designspace
@@ -13,6 +13,7 @@
     </axes>
     <sources>
         <source filename="master_0/SourceCode_ExtraLight.ufo" name="master_0">
+            <lib copy="1" />
             <location>
                 <dimension name="weight" xvalue="0" />
             </location>