diff --git a/src/textures/DataTexture2DArray.js b/src/textures/DataTexture2DArray.js
index bd67e111830aba..c20e336120b475 100644
--- a/src/textures/DataTexture2DArray.js
+++ b/src/textures/DataTexture2DArray.js
@@ -16,6 +16,7 @@ class DataTexture2DArray extends Texture {
 
 		this.generateMipmaps = false;
 		this.flipY = false;
+		this.unpackAlignment = 1;
 
 		this.needsUpdate = true;
 
diff --git a/src/textures/DataTexture3D.js b/src/textures/DataTexture3D.js
index f4a936e2a89525..97d6b9781991d8 100644
--- a/src/textures/DataTexture3D.js
+++ b/src/textures/DataTexture3D.js
@@ -24,6 +24,7 @@ class DataTexture3D extends Texture {
 
 		this.generateMipmaps = false;
 		this.flipY = false;
+		this.unpackAlignment = 1;
 
 		this.needsUpdate = true;