From 4a71f5f602be5edac10a223d34d74a7bf1de5cd4 Mon Sep 17 00:00:00 2001
From: Sergey Vlasov <sigprof@gmail.com>
Date: Mon, 3 Jul 2023 21:36:19 +0300
Subject: [PATCH] planck/rev7: Fix build without AUDIO_ENABLE (#21408)

---
 keyboards/planck/rev7/matrix.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/keyboards/planck/rev7/matrix.c b/keyboards/planck/rev7/matrix.c
index df1e627e83..c89c399a40 100644
--- a/keyboards/planck/rev7/matrix.c
+++ b/keyboards/planck/rev7/matrix.c
@@ -19,6 +19,7 @@
 #include "hal_pal.h"
 #include "hal_pal_lld.h"
 #include "quantum.h"
+#include <math.h>
 
 // STM32-specific watchdog config calculations
 // timeout = 31.25us * PR * (RL + 1)