diff --git a/run b/run
index d5f7f92..82d4c3f 100755
--- a/run
+++ b/run
@@ -459,7 +459,7 @@ step19() {
   git archive --prefix=zig-$STEP19_/ $STEP19 | tar -C .. -x
   {
     pushd "../zig-$STEP19_"
-    ../zig-$STEP16_/build/zig2 build --zig-lib-dir lib update-zig1
+    ../zig-$STEP18_/build/zig2 build --zig-lib-dir lib update-zig1
     popd
   }
 }