diff --git a/drivers/pinmux/stm32/pinmux_stm32l0.h b/drivers/pinmux/stm32/pinmux_stm32l0.h
index af2015a7a1874..7941e0551c180 100644
--- a/drivers/pinmux/stm32/pinmux_stm32l0.h
+++ b/drivers/pinmux/stm32/pinmux_stm32l0.h
@@ -44,14 +44,26 @@
 #define STM32L0_PINMUX_FUNC_PA3_LPUART1_RX \
 	(STM32_PINMUX_ALT_FUNC_6 | STM32_PUPDR_NO_PULL)
 
+/* I2C1 */
+#define STM32L0_PINMUX_FUNC_PA9_I2C1_SCL \
+	(STM32_PINMUX_ALT_FUNC_6 | STM32_OPENDRAIN_PULLUP)
+#define STM32L0_PINMUX_FUNC_PA10_I2C1_SDA \
+	(STM32_PINMUX_ALT_FUNC_6 | STM32_OPENDRAIN_PULLUP)
+
+#define STM32L0_PINMUX_FUNC_PB6_I2C1_SCL \
+	(STM32_PINMUX_ALT_FUNC_1 | STM32_OPENDRAIN_PULLUP)
+#define STM32L0_PINMUX_FUNC_PB7_I2C1_SDA \
+	(STM32_PINMUX_ALT_FUNC_1 | STM32_OPENDRAIN_PULLUP)
+
 #define STM32L0_PINMUX_FUNC_PB8_I2C1_SCL \
 	(STM32_PINMUX_ALT_FUNC_4 | STM32_OPENDRAIN_PULLUP)
 #define STM32L0_PINMUX_FUNC_PB9_I2C1_SDA \
 	(STM32_PINMUX_ALT_FUNC_4 | STM32_OPENDRAIN_PULLUP)
 
-#define STM32L0_PINMUX_FUNC_PA9_I2C1_SCL \
+/* I2C2 */
+#define STM32L0_PINMUX_FUNC_PB10_I2C2_SCL \
 	(STM32_PINMUX_ALT_FUNC_6 | STM32_OPENDRAIN_PULLUP)
-#define STM32L0_PINMUX_FUNC_PA10_I2C1_SDA \
+#define STM32L0_PINMUX_FUNC_PB11_I2C2_SDA \
 	(STM32_PINMUX_ALT_FUNC_6 | STM32_OPENDRAIN_PULLUP)
 
 #define STM32L0_PINMUX_FUNC_PB13_I2C2_SCL \
@@ -59,11 +71,20 @@
 #define STM32L0_PINMUX_FUNC_PB14_I2C2_SDA \
 	(STM32_PINMUX_ALT_FUNC_5 | STM32_OPENDRAIN_PULLUP)
 
+/* I2C3 */
+#define STM32L0_PINMUX_FUNC_PA8_I2C3_SCL \
+	(STM32_PINMUX_ALT_FUNC_7 | STM32_OPENDRAIN_PULLUP)
+#define STM32L0_PINMUX_FUNC_PB4_I2C3_SDA \
+	(STM32_PINMUX_ALT_FUNC_7 | STM32_OPENDRAIN_PULLUP)
+
 #define STM32L0_PINMUX_FUNC_PC0_I2C3_SCL \
 	(STM32_PINMUX_ALT_FUNC_7 | STM32_OPENDRAIN_PULLUP)
 #define STM32L0_PINMUX_FUNC_PC1_I2C3_SDA \
 	(STM32_PINMUX_ALT_FUNC_7 | STM32_OPENDRAIN_PULLUP)
 
+#define STM32L0_PINMUX_FUNC_PC9_I2C3_SDA \
+	(STM32_PINMUX_ALT_FUNC_7 | STM32_OPENDRAIN_PULLUP)
+
 /*
  * Increase SCK pin speed to avoid last data bit corruption which is
  * a known issue of STM32L0 SPI peripheral (see errata sheets).