diff --git a/mlir/lib/Analysis/FlatLinearValueConstraints.cpp b/mlir/lib/Analysis/FlatLinearValueConstraints.cpp
--- a/mlir/lib/Analysis/FlatLinearValueConstraints.cpp
+++ b/mlir/lib/Analysis/FlatLinearValueConstraints.cpp
@@ -1078,10 +1078,11 @@
         other.swapVar(s, loc);
       else
         other.insertSymbolVar(s - other.getNumDimVars(), *maybeValue);
-    } else
+    } else {
       // if the symbol has no Value attached, we have to add it as a new symbol
       // to `other`
       other.insertSymbolVar(s - other.getNumDimVars());
+    }
     s++;
   }