diff --git a/libctru/include/3ds/gpu/enums.h b/libctru/include/3ds/gpu/enums.h
index a8ab577..95c0b1f 100644
--- a/libctru/include/3ds/gpu/enums.h
+++ b/libctru/include/3ds/gpu/enums.h
@@ -78,6 +78,18 @@ typedef enum
 	GPU_ETC1A4   = 0xD, ///< ETC1 texture compression + 4-bit Alpha
 } GPU_TEXCOLOR;
 
+// Texture faces.
+typedef enum
+{
+	GPU_TEXFACE_2D = 0, // 2D face
+	GPU_POSITIVE_X = 0, // +X face
+	GPU_NEGATIVE_X = 1, // -X face
+	GPU_POSITIVE_Y = 2, // +Y face
+	GPU_NEGATIVE_Y = 3, // -Y face
+	GPU_POSITIVE_Z = 4, // +Z face
+	GPU_NEGATIVE_Z = 5, // -Z face
+} GPU_TEXFACE;
+
 /// Procedural texture clamp modes.
 typedef enum
 {