diff --git a/pkg/compose/hook.go b/pkg/compose/hook.go
index 2c36db85891..0681e507994 100644
--- a/pkg/compose/hook.go
+++ b/pkg/compose/hook.go
@@ -61,15 +61,17 @@ func (s composeService) runHook(ctx context.Context, ctr container.Summary, serv
 		return s.runWaitExec(ctx, exec.ID, service, listener)
 	}
 
-	height, width := s.stdout().GetTtySize()
-	consoleSize := client.ConsoleSize{
-		Width:  width,
-		Height: height,
+	attachOptions := client.ExecAttachOptions{
+		TTY: service.Tty,
 	}
-	attach, err := s.apiClient().ExecAttach(ctx, exec.ID, client.ExecAttachOptions{
-		TTY:         service.Tty,
-		ConsoleSize: consoleSize,
-	})
+	if service.Tty {
+		height, width := s.stdout().GetTtySize()
+		attachOptions.ConsoleSize = client.ConsoleSize{
+			Width:  width,
+			Height: height,
+		}
+	}
+	attach, err := s.apiClient().ExecAttach(ctx, exec.ID, attachOptions)
 	if err != nil {
 		return err
 	}
diff --git a/pkg/compose/hook_test.go b/pkg/compose/hook_test.go
new file mode 100644
index 00000000000..5104bf41925
--- /dev/null
+++ b/pkg/compose/hook_test.go
@@ -0,0 +1,116 @@
+/*
+   Copyright 2020 Docker Compose CLI authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package compose
+
+import (
+	"net"
+	"os"
+	"testing"
+
+	"github.com/compose-spec/compose-go/v2/types"
+	"github.com/containerd/console"
+	"github.com/docker/cli/cli/streams"
+	"github.com/moby/moby/api/types/container"
+	"github.com/moby/moby/client"
+	"go.uber.org/mock/gomock"
+	"gotest.tools/v3/assert"
+
+	"github.com/docker/compose/v5/pkg/api"
+	"github.com/docker/compose/v5/pkg/mocks"
+)
+
+// TestRunHook_ConsoleSize verifies that ConsoleSize is only passed to ExecAttach
+// when the service has TTY enabled. When TTY is disabled, passing a non-zero
+// ConsoleSize causes the Docker daemon to return "console size is only supported
+// when TTY is enabled" (regression introduced in v5.1.0).
+func TestRunHook_ConsoleSize(t *testing.T) {
+	tests := []struct {
+		name            string
+		tty             bool
+		expectedConsole client.ConsoleSize
+	}{
+		{
+			name:            "no tty - ConsoleSize must be zero",
+			tty:             false,
+			expectedConsole: client.ConsoleSize{},
+		},
+		{
+			name:            "with tty - ConsoleSize should reflect terminal dimensions",
+			tty:             true,
+			expectedConsole: client.ConsoleSize{Width: 80, Height: 24},
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			mockCtrl := gomock.NewController(t)
+			defer mockCtrl.Finish()
+
+			mockAPI := mocks.NewMockAPIClient(mockCtrl)
+			mockCli := mocks.NewMockCli(mockCtrl)
+			mockCli.EXPECT().Client().Return(mockAPI).AnyTimes()
+			mockCli.EXPECT().Err().Return(streams.NewOut(os.Stderr)).AnyTimes()
+
+			// Create a PTY so GetTtySize() returns real non-zero dimensions,
+			// simulating an interactive terminal session.
+			pty, slavePath, err := console.NewPty()
+			assert.NilError(t, err)
+			defer pty.Close() //nolint:errcheck
+			assert.NilError(t, pty.Resize(console.WinSize{Height: 24, Width: 80}))
+
+			slaveFile, err := os.OpenFile(slavePath, os.O_RDWR, 0)
+			assert.NilError(t, err)
+			defer slaveFile.Close() //nolint:errcheck
+
+			mockCli.EXPECT().Out().Return(streams.NewOut(slaveFile)).AnyTimes()
+
+			service := types.ServiceConfig{
+				Name: "test",
+				Tty:  tc.tty,
+			}
+			hook := types.ServiceHook{Command: []string{"echo", "hello"}}
+			ctr := container.Summary{ID: "container123"}
+
+			mockAPI.EXPECT().
+				ExecCreate(gomock.Any(), "container123", gomock.Any()).
+				Return(client.ExecCreateResult{ID: "exec123"}, nil)
+
+			// Return a pipe that immediately closes so the reader gets EOF.
+			serverConn, clientConn := net.Pipe()
+			serverConn.Close() //nolint:errcheck
+			mockAPI.EXPECT().
+				ExecAttach(gomock.Any(), "exec123", client.ExecAttachOptions{
+					TTY:         tc.tty,
+					ConsoleSize: tc.expectedConsole,
+				}).
+				Return(client.ExecAttachResult{
+					HijackedResponse: client.NewHijackedResponse(clientConn, ""),
+				}, nil)
+
+			mockAPI.EXPECT().
+				ExecInspect(gomock.Any(), "exec123", gomock.Any()).
+				Return(client.ExecInspectResult{ExitCode: 0}, nil)
+
+			s, err := NewComposeService(mockCli)
+			assert.NilError(t, err)
+
+			noopListener := func(api.ContainerEvent) {}
+			err = s.(*composeService).runHook(t.Context(), ctr, service, hook, noopListener)
+			assert.NilError(t, err)
+		})
+	}
+}