diff --git a/Configurations/00-base-templates.conf b/Configurations/00-base-templates.conf
index ed50910eeddc7b570a2f348b430bc54780b67c11..8c47e9e596e87b64f7b02b7331bac65b98ceca8b 100644
--- a/Configurations/00-base-templates.conf
+++ b/Configurations/00-base-templates.conf
@@ -80,10 +80,11 @@
             sub {
                 unless ($disabled{zlib}) {
                     if (defined($disabled{"zlib-dynamic"})) {
-                        return $withargs{zlib_lib};
+                        return $withargs{zlib_lib} // "ZLIB1";
                     }
                 }
-                return (); },
+                return ();
+            },
 
         ld              => "link",
         lflags          => "/nologo",