diff --git a/mlir/lib/IR/StandardTypes.cpp b/mlir/lib/IR/StandardTypes.cpp
--- a/mlir/lib/IR/StandardTypes.cpp
+++ b/mlir/lib/IR/StandardTypes.cpp
@@ -199,7 +199,9 @@
 
 int64_t ShapedType::getRank() const { return getShape().size(); }
 
-bool ShapedType::hasRank() const { return !isa<UnrankedTensorType>(); }
+bool ShapedType::hasRank() const {
+  return !isa<UnrankedMemRefType>() && !isa<UnrankedTensorType>();
+}
 
 int64_t ShapedType::getDimSize(unsigned idx) const {
   assert(idx < getRank() && "invalid index for shaped type");