diff --git a/mlir/test/mlir-tblgen/attr-or-type-format.td b/mlir/test/mlir-tblgen/attr-or-type-format.td
--- a/mlir/test/mlir-tblgen/attr-or-type-format.td
+++ b/mlir/test/mlir-tblgen/attr-or-type-format.td
@@ -177,6 +177,23 @@
   let assemblyFormat = "$a";
 }
 
+// Check that the self-type parameter can be referenced without being bound.
+
+// ATTR-LABEL: Attribute TestHAttr::parse
+// ATTR: _result_type = reqType
+// ATTR: parseUseType(odsParser,
+// ATTR-NEXT: *_result_type
+
+// ATTR-LABEL: void TestHAttr::print
+// ATTR: printUseType(odsPrinter,
+// ATTR-NEXT: getType()
+
+def AttrE : TestAttr<"TestH"> {
+  let parameters = (ins AttributeSelfTypeParameter<"">:$type);
+  let mnemonic = "attr_e";
+  let assemblyFormat = "custom<UseType>(ref($type))";
+}
+
 /// Test type parser and printer that mix variables and struct are generated
 /// correctly.
 
diff --git a/mlir/tools/mlir-tblgen/AttrOrTypeFormatGen.cpp b/mlir/tools/mlir-tblgen/AttrOrTypeFormatGen.cpp
--- a/mlir/tools/mlir-tblgen/AttrOrTypeFormatGen.cpp
+++ b/mlir/tools/mlir-tblgen/AttrOrTypeFormatGen.cpp
@@ -298,6 +298,8 @@
   for (const AttrOrTypeParameter &param : params) {
     os << formatv("::mlir::FailureOr<{0}> _result_{1};\n",
                   param.getCppStorageType(), param.getName());
+    if (auto *selfTypeParam = dyn_cast<AttributeSelfTypeParameter>(&param))
+      genAttrSelfTypeParser(os, ctx, *selfTypeParam);
   }
 
   // Store the initial location of the parser.
@@ -313,8 +315,6 @@
   // Emit an assert for each mandatory parameter. Triggering an assert means
   // the generated parser is incorrect (i.e. there is a bug in this code).
   for (const AttrOrTypeParameter &param : params) {
-    if (auto *selfTypeParam = dyn_cast<AttributeSelfTypeParameter>(&param))
-      genAttrSelfTypeParser(os, ctx, *selfTypeParam);
     if (param.isOptional())
       continue;
     os << formatv("assert(::mlir::succeeded(_result_{0}));\n", param.getName());
@@ -1033,7 +1033,7 @@
     seenParams.set(idx);
 
     // Otherwise, to be referenced, a variable must have been bound.
-  } else if (!seenParams.test(idx)) {
+  } else if (!seenParams.test(idx) && !isa<AttributeSelfTypeParameter>(*it)) {
     return emitError(loc, "parameter '" + name +
                               "' must be bound before it is referenced");
   }