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-rw-r--r--keyboards/planck/rev7/matrix.c1
1 files changed, 1 insertions, 0 deletions
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)