diff --git a/dts/arm/st/l1/stm32l1.dtsi b/dts/arm/st/l1/stm32l1.dtsi
index a910835753b..661b23b50c5 100644
--- a/dts/arm/st/l1/stm32l1.dtsi
+++ b/dts/arm/st/l1/stm32l1.dtsi
@@ -173,6 +173,13 @@
 			};
 		};
 
+		iwdg: watchdog@40003000 {
+			compatible = "st,stm32-watchdog";
+			reg = <0x40003000 0x400>;
+			label = "IWDG";
+			status = "disabled";
+		};
+
 		wwdg: watchdog@40002c00 {
 			compatible = "st,stm32-window-watchdog";
 			reg = <0x40002C00 0x400>;
diff --git a/soc/arm/st_stm32/stm32l1/dts_fixup.h b/soc/arm/st_stm32/stm32l1/dts_fixup.h
index 6b32fa3de56..b41b3cf1be1 100644
--- a/soc/arm/st_stm32/stm32l1/dts_fixup.h
+++ b/soc/arm/st_stm32/stm32l1/dts_fixup.h
@@ -123,6 +123,8 @@
 #define DT_SPI_2_CLOCK_BITS             DT_ST_STM32_SPI_40003800_CLOCK_BITS
 #define DT_SPI_2_CLOCK_BUS              DT_ST_STM32_SPI_40003800_CLOCK_BUS
 
+#define DT_WDT_0_NAME			DT_INST_0_ST_STM32_WATCHDOG_LABEL
+
 #define DT_WWDT_0_BASE_ADDRESS		DT_INST_0_ST_STM32_WINDOW_WATCHDOG_BASE_ADDRESS
 #define DT_WWDT_0_NAME			DT_INST_0_ST_STM32_WINDOW_WATCHDOG_LABEL
 #define DT_WWDT_0_IRQ			DT_INST_0_ST_STM32_WINDOW_WATCHDOG_IRQ_0
diff --git a/soc/arm/st_stm32/stm32l1/soc.h b/soc/arm/st_stm32/stm32l1/soc.h
index b1a3fbe0996..d3000ceb903 100644
--- a/soc/arm/st_stm32/stm32l1/soc.h
+++ b/soc/arm/st_stm32/stm32l1/soc.h
@@ -61,6 +61,10 @@
 #include <stm32l1xx_ll_spi.h>
 #endif
 
+#ifdef CONFIG_IWDG_STM32
+#include <stm32l1xx_ll_iwdg.h>
+#endif
+
 #ifdef CONFIG_WWDG_STM32
 #include <stm32l1xx_ll_wwdg.h>
 #endif