diff --git a/mlir/include/mlir/Conversion/Passes.td b/mlir/include/mlir/Conversion/Passes.td
--- a/mlir/include/mlir/Conversion/Passes.td
+++ b/mlir/include/mlir/Conversion/Passes.td
@@ -67,6 +67,7 @@
   }];
   let constructor = "mlir::createLowerAffinePass()";
   let dependentDialects = [
+    "memref::MemRefDialect",
     "scf::SCFDialect",
     "StandardOpsDialect",
     "vector::VectorDialect"
diff --git a/mlir/test/Conversion/AffineToStandard/no-memref.mlir b/mlir/test/Conversion/AffineToStandard/no-memref.mlir
new file mode 100644
--- /dev/null
+++ b/mlir/test/Conversion/AffineToStandard/no-memref.mlir
@@ -0,0 +1,11 @@
+// RUN: mlir-opt -lower-affine %s | FileCheck %s
+
+// Regression test checking that the memref dialect is loaded as dependency by
+// the lowering pass. We shouldn't fail trying to create memref.load here.
+
+// CHECK-LABEL: @no_memref_op
+func @no_memref_op(%arg0: memref<f32>) {
+  // CHECK: memref.load
+  affine.load %arg0[] : memref<f32>
+  return
+}