diff --git a/ggml.h b/ggml.h
index 7d8b7a182..7d6f6a53f 100644
--- a/ggml.h
+++ b/ggml.h
@@ -203,6 +203,7 @@ enum ggml_type {
     GGML_TYPE_F16  = 1,
     GGML_TYPE_Q4_0 = 2,
     GGML_TYPE_Q4_1 = 3,
+	GGML_TYPE_Q4_2 = 5,
     GGML_TYPE_I8,
     GGML_TYPE_I16,
     GGML_TYPE_I32,