diff --git a/filesystem/android_device_product_out.go b/filesystem/android_device_product_out.go
index 2c8cad6..7d37f1e 100644
--- a/filesystem/android_device_product_out.go
+++ b/filesystem/android_device_product_out.go
@@ -73,6 +73,12 @@
 							Rule:   android.CpWithBash,
 							Input:  fip.SourcePath,
 							Output: fip.FullInstallPath,
+							Args: map[string]string{
+								// Preserve timestamps for adb sync, so that this installed file's
+								// timestamp matches the timestamp in the filesystem's intermediate
+								// staging dir
+								"cpFlags": "-p",
+							},
 						})
 					} else {
 						ctx.Build(pctx, android.BuildParams{
diff --git a/filesystem/filesystem.go b/filesystem/filesystem.go
index 0381951..979dba5 100644
--- a/filesystem/filesystem.go
+++ b/filesystem/filesystem.go
@@ -868,7 +868,9 @@
 	dirsToSpecs[rootDir] = rootDirSpecs
 	dirsToSpecs[rebasedDir] = rebasedDirSpecs
 
-	return f.CopySpecsToDirs(ctx, builder, dirsToSpecs)
+	// Preserve timestamps for adb sync, so that this staging dir file matches the timestamp in the
+	// out/target/product staging directory.
+	return f.CopySpecsToDirs(ctx, builder, dirsToSpecs, true)
 }
 
 func (f *filesystem) rootDirString() string {