diff --git a/irr/include/ITexture.h b/irr/include/ITexture.h
index 8c31dc7e9..b2ed300a5 100644
--- a/irr/include/ITexture.h
+++ b/irr/include/ITexture.h
@@ -186,11 +186,8 @@ class ITexture : public virtual IReferenceCounted
 	You may want to call regenerateMipMapLevels() after this when you changed any data.	*/
 	virtual void unlock() = 0;
 
-	//! Regenerates the mip map levels of the texture.
-	/** Required after modifying the texture, usually after calling unlock().
-	\param layer It informs a texture about which cubemap or texture array layer
-	needs mipmap regeneration. */
-	virtual void regenerateMipMapLevels(u32 layer = 0) = 0;
+	//! Regenerates the mip map levels of the texture. */
+	virtual void regenerateMipMapLevels() = 0;
 
 	//! Get original size of the texture.
 	/** The texture is usually scaled, if it was created with an unoptimal
diff --git a/irr/src/CNullDriver.h b/irr/src/CNullDriver.h
index b31c2c13f..311b5c125 100644
--- a/irr/src/CNullDriver.h
+++ b/irr/src/CNullDriver.h
@@ -605,7 +605,7 @@ class CNullDriver : public IVideoDriver, public IGPUProgrammingServices
 
 		void *lock(E_TEXTURE_LOCK_MODE mode = ETLM_READ_WRITE, u32 mipmapLevel = 0, u32 layer = 0, E_TEXTURE_LOCK_FLAGS lockFlags = ETLF_FLIP_Y_UP_RTT) override { return 0; }
 		void unlock() override {}
-		void regenerateMipMapLevels(u32 layer = 0) override {}
+		void regenerateMipMapLevels() override {}
 	};
 	core::array<SSurface> Textures;
 
diff --git a/irr/src/COpenGLCoreTexture.h b/irr/src/COpenGLCoreTexture.h
index e25b457bc..04024ac19 100644
--- a/irr/src/COpenGLCoreTexture.h
+++ b/irr/src/COpenGLCoreTexture.h
@@ -115,8 +115,7 @@ class COpenGLCoreTexture : public ITexture
 		}
 
 		if (HasMipMaps) {
-			for (size_t i = 0; i < tmpImages->size(); ++i)
-				regenerateMipMapLevels(i);
+			regenerateMipMapLevels();
 		}
 
 		if (!KeepImage) {
@@ -389,7 +388,7 @@ class COpenGLCoreTexture : public ITexture
 		LockLayer = 0;
 	}
 
-	void regenerateMipMapLevels(u32 layer = 0) override
+	void regenerateMipMapLevels() override
 	{
 		if (!HasMipMaps || (Size.Width <= 1 && Size.Height <= 1))
 			return;