diff --git a/examples/quantize/quantize.cpp b/examples/quantize/quantize.cpp
index fac504df..89de794b 100644
--- a/examples/quantize/quantize.cpp
+++ b/examples/quantize/quantize.cpp
@@ -144,6 +144,7 @@ static void usage(const char * executable) {
     printf("  --exclude-weights tensor_name: use importance matrix for this/these tensor(s)\n");
     printf("  --output-tensor-type ggml_type: use this ggml_type for the output.weight tensor.\n");
     printf("  --token-embedding-type ggml_type: use this ggml_type for the token_embd.weight tensor.\n\n");
+    printf("  --custom-q regex1=type1,regex2=type2...: use this to specify custom quantization type rules.\n\n");
     printf("Additional specific tensor quantization types used in the custom quant scheme 'CQS (default is Q2_K):\n");
     printf("      --attn-q-type ggml_type: use this ggml_type for the attn_q.weight tensor.\n");
     printf("      --attn-k-type ggml_type: use this ggml_type for the attn_k.weight tensor.\n");