diff --git a/quantum/vial.c b/quantum/vial.c
index 16328eedbb..8fcad65c6d 100644
--- a/quantum/vial.c
+++ b/quantum/vial.c
@@ -29,7 +29,6 @@ enum {
     vial_get_def = 0x02,
     vial_get_encoder = 0x03,
     vial_set_encoder = 0x04,
-    vial_get_keymap_fast = 0x05,
 };
 
 void vial_handle_cmd(uint8_t *msg, uint8_t length) {
@@ -88,26 +87,6 @@ void vial_handle_cmd(uint8_t *msg, uint8_t length) {
             break;
         }
 #endif
-        /*
-         * Retrieve up to 16 keycodes at once.
-         * First byte: layer to retrieve
-         * Second byte: row to retrieve
-         * 16 more bytes: columns to retrieve (at that layer/row). 0xFF padding used to ignore that position.
-         */
-        case vial_get_keymap_fast: {
-            uint8_t req[16];
-            uint8_t layer = msg[2];
-            uint8_t row = msg[3];
-            memcpy(req, &msg[4], sizeof(req));
-
-            for (int i = 0; i < 16; ++i) {
-                if (req[i] != 0xFF) {
-                    uint16_t keycode = dynamic_keymap_get_keycode(layer, row, req[i]);
-                    msg[2 * i] = keycode >> 8;
-                    msg[2 * i + 1] = keycode & 0xFF;
-                }
-            }
-        }
     }
 }