diff --git a/src/board/system76/galp3-c/include/board/cpu.h b/src/board/system76/galp3-c/include/board/cpu.h
new file mode 100644
index 0000000..1ed4f4d
--- /dev/null
+++ b/src/board/system76/galp3-c/include/board/cpu.h
@@ -0,0 +1,6 @@
+#ifndef _BOARD_CPU_H
+#define _BOARD_CPU_H
+
+#define F_CPU 9200000ULL
+
+#endif // _BOARD_CPU_H