diff --git a/pgtype/convert.go b/pgtype/convert.go
index 4eb8014a..7fddeaa8 100644
--- a/pgtype/convert.go
+++ b/pgtype/convert.go
@@ -64,6 +64,9 @@ func underlyingNumberType(val any) (any, bool) {
 	case reflect.String:
 		convVal := refVal.String()
 		return convVal, reflect.TypeOf(convVal) != refVal.Type()
+	case reflect.Bool:
+		convVal := refVal.Bool()
+		return convVal, reflect.TypeOf(convVal) != refVal.Type()
 	}
 
 	return nil, false
diff --git a/pgtype/pgtype.go b/pgtype/pgtype.go
index 21ec179a..05f22a8c 100644
--- a/pgtype/pgtype.go
+++ b/pgtype/pgtype.go
@@ -666,6 +666,7 @@ var elemKindToPointerTypes map[reflect.Kind]reflect.Type = map[reflect.Kind]refl
 	reflect.Float32: reflect.TypeOf(new(float32)),
 	reflect.Float64: reflect.TypeOf(new(float64)),
 	reflect.String:  reflect.TypeOf(new(string)),
+	reflect.Bool:    reflect.TypeOf(new(bool)),
 }
 
 type underlyingTypeScanPlan struct {
diff --git a/values_test.go b/values_test.go
index 658d0ce8..854fe279 100644
--- a/values_test.go
+++ b/values_test.go
@@ -881,6 +881,7 @@ func TestEncodeTypeRename(t *testing.T) {
 		conn.TypeMap().RegisterDefaultPgType(inUint32, "int8")
 		conn.TypeMap().RegisterDefaultPgType(inUint64, "int8")
 		conn.TypeMap().RegisterDefaultPgType(inString, "text")
+		conn.TypeMap().RegisterDefaultPgType(inBool, "bool")
 
 		err := conn.QueryRow(context.Background(), "select $1::int, $2::int, $3::int2, $4::int4, $5::int8, $6::int, $7::int, $8::int, $9::int, $10::int, $11::text, $12::bool",
 			inInt, inInt8, inInt16, inInt32, inInt64, inUint, inUint8, inUint16, inUint32, inUint64, inString, inBool,