diff --git a/ggml.c b/ggml.c
index aa91511fa..222d199be 100644
--- a/ggml.c
+++ b/ggml.c
@@ -729,7 +729,7 @@ static void quantize_row_q4_1_reference(const float * restrict x, void * restric
     }
 }
 
-void quantize_row_q4_1(const float * restrict x, void * restrict vy, int k) {
+static void quantize_row_q4_1(const float * restrict x, void * restrict vy, int k) {
     assert(k % QK == 0);
 
 #if defined(__AVX2__)