diff --git a/mlir/include/mlir/Analysis/Presburger/PWMAFunction.h b/mlir/include/mlir/Analysis/Presburger/PWMAFunction.h
--- a/mlir/include/mlir/Analysis/Presburger/PWMAFunction.h
+++ b/mlir/include/mlir/Analysis/Presburger/PWMAFunction.h
@@ -139,7 +139,7 @@
 ///
 /// Support is provided to compare equality of two such functions as well as
 /// finding the value of the function at a point.
-class PWMAFunction : public PresburgerSpace {
+class PWMAFunction : private PresburgerSpace {
 public:
   PWMAFunction(const PresburgerSpace &space, unsigned numOutputs)
       : PresburgerSpace(space), numOutputs(numOutputs) {