diff --git a/pkg/docker/build.go b/pkg/docker/build.go
index ebfabfa7a4..a332a1890e 100644
--- a/pkg/docker/build.go
+++ b/pkg/docker/build.go
@@ -1,9 +1,12 @@
 package docker
 
 import (
+	"bufio"
 	"fmt"
+	"log"
 	"os"
 	"os/exec"
+	"path"
 	"runtime"
 	"strings"
 
@@ -11,11 +14,47 @@ import (
 
 	"github.com/replicate/cog/pkg/util"
 	"github.com/replicate/cog/pkg/util/console"
+	"github.com/replicate/cog/pkg/util/files"
 )
 
+func sanitiseDockerIgnore(dir string) error {
+	dockerIgnorePath := path.Join(dir, ".dockerignore")
+	fileExists, err := files.Exists(dockerIgnorePath)
+	if err != nil {
+		return err
+	}
+	if !fileExists {
+		return nil
+	}
+
+	console.Debug("Sanitising .dockerignore.")
+	file, err := os.Open(dockerIgnorePath)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	scanner := bufio.NewScanner(file)
+	newContents := ""
+	for scanner.Scan() {
+		line := scanner.Text()
+		if line == ".cog" {
+			continue
+		}
+		newContents += line + "\n"
+	}
+	file.Close()
+	if err := scanner.Err(); err != nil {
+		log.Fatal(err)
+	}
+
+	return os.WriteFile(dockerIgnorePath, []byte(newContents), 0o644)
+}
+
 func Build(dir, dockerfile, imageName string, secrets []string, noCache bool, progressOutput string, epoch int64) error {
 	var args []string
 
+	sanitiseDockerIgnore(dir)
+
 	args = append(args,
 		"buildx", "build",
 	)
diff --git a/test-integration/test_integration/fixtures/dockerignore-cog-project/.dockerignore b/test-integration/test_integration/fixtures/dockerignore-cog-project/.dockerignore
new file mode 100644
index 0000000000..370ff3fb26
--- /dev/null
+++ b/test-integration/test_integration/fixtures/dockerignore-cog-project/.dockerignore
@@ -0,0 +1 @@
+.cog
diff --git a/test-integration/test_integration/fixtures/dockerignore-cog-project/cog.yaml b/test-integration/test_integration/fixtures/dockerignore-cog-project/cog.yaml
new file mode 100644
index 0000000000..ce622845eb
--- /dev/null
+++ b/test-integration/test_integration/fixtures/dockerignore-cog-project/cog.yaml
@@ -0,0 +1,3 @@
+build:
+  python_version: "3.8"
+predict: "predict.py:Predictor"
diff --git a/test-integration/test_integration/fixtures/dockerignore-cog-project/predict.py b/test-integration/test_integration/fixtures/dockerignore-cog-project/predict.py
new file mode 100644
index 0000000000..44f6992b01
--- /dev/null
+++ b/test-integration/test_integration/fixtures/dockerignore-cog-project/predict.py
@@ -0,0 +1,6 @@
+from cog import BasePredictor
+
+
+class Predictor(BasePredictor):
+    def predict(self, s: str) -> str:
+        return "hello " + s
diff --git a/test-integration/test_integration/test_build.py b/test-integration/test_integration/test_build.py
index 1e25d37764..c34726acfc 100644
--- a/test-integration/test_integration/test_build.py
+++ b/test-integration/test_integration/test_build.py
@@ -315,3 +315,26 @@ def test_precompile(docker_image):
         capture_output=True,
     )
     assert build_process.returncode == 0
+
+
+def test_dockerignore_dot_cog(docker_image):
+    project_dir = Path(__file__).parent / "fixtures/dockerignore-cog-project"
+    # We rewrite the .dockerignore file so preserve its contents across the test.
+    dockerignore_path = os.path.join(project_dir, ".dockerignore")
+    dockerignore_contents = ""
+    with open(dockerignore_path, encoding="utf-8") as handle:
+        dockerignore_contents = handle.read()
+    build_process = subprocess.run(
+        [
+            "cog",
+            "build",
+            "-t",
+            docker_image,
+        ],
+        cwd=project_dir,
+        capture_output=True,
+        check=False,
+    )
+    with open(dockerignore_path, "w", encoding="utf-8") as handle:
+        handle.write(dockerignore_contents)
+    assert build_process.returncode == 0