diff --git a/include/zephyr/drivers/clock_control/stm32_clock_control.h b/include/zephyr/drivers/clock_control/stm32_clock_control.h
index 753aa0eafdbb10c..ffc882d9467cf13 100644
--- a/include/zephyr/drivers/clock_control/stm32_clock_control.h
+++ b/include/zephyr/drivers/clock_control/stm32_clock_control.h
@@ -444,7 +444,7 @@ struct stm32_pclken {
 #define STM32_CLOCK_INFO(clk_index, node_id)				\
 	{								\
 	.enr = DT_CLOCKS_CELL_BY_IDX(node_id, clk_index, bits),		\
-	.bus = DT_CLOCKS_CELL_BY_IDX(node_id, clk_index, bus) & 0xff,	\
+	.bus = DT_CLOCKS_CELL_BY_IDX(node_id, clk_index, bus) & 0x1ff,	\
 	.div = DT_CLOCKS_CELL_BY_IDX(node_id, clk_index, bus) >>	\
 		STM32_CLOCK_DIV_SHIFT,					\
 	}