diff --git a/src/cmd/compile/internal/types2/conversions.go b/src/cmd/compile/internal/types2/conversions.go
index b8d8f6e150..05d0d37192 100644
--- a/src/cmd/compile/internal/types2/conversions.go
+++ b/src/cmd/compile/internal/types2/conversions.go
@@ -56,7 +56,7 @@ func (check *Checker) conversion(x *operand, T Type) {
 		// If T's type set is empty, or if it doesn't
 		// have specific types, constant x cannot be
 		// converted.
-		ok = T.(*TypeParam).underIs(func(u Type) bool {
+		ok = Unalias(T).(*TypeParam).underIs(func(u Type) bool {
 			// u is nil if there are no specific type terms
 			if u == nil {
 				cause = check.sprintf("%s does not contain specific types", T)
diff --git a/src/go/types/conversions.go b/src/go/types/conversions.go
index 98a1f9f661..f548e177de 100644
--- a/src/go/types/conversions.go
+++ b/src/go/types/conversions.go
@@ -59,7 +59,7 @@ func (check *Checker) conversion(x *operand, T Type) {
 		// If T's type set is empty, or if it doesn't
 		// have specific types, constant x cannot be
 		// converted.
-		ok = T.(*TypeParam).underIs(func(u Type) bool {
+		ok = Unalias(T).(*TypeParam).underIs(func(u Type) bool {
 			// u is nil if there are no specific type terms
 			if u == nil {
 				cause = check.sprintf("%s does not contain specific types", T)
diff --git a/src/internal/types/testdata/fixedbugs/issue67547.go b/src/internal/types/testdata/fixedbugs/issue67547.go
new file mode 100644
index 0000000000..cca8ba2367
--- /dev/null
+++ b/src/internal/types/testdata/fixedbugs/issue67547.go
@@ -0,0 +1,10 @@
+// Copyright 2024 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package p
+
+func _[P int]() {
+	type A = P
+	_ = A(0) // don't crash with this conversion
+}