diff --git a/dts/arm/st/f2/stm32f2.dtsi b/dts/arm/st/f2/stm32f2.dtsi
index 3c7626e414c..a8c1f8b2013 100644
--- a/dts/arm/st/f2/stm32f2.dtsi
+++ b/dts/arm/st/f2/stm32f2.dtsi
@@ -201,6 +201,7 @@
 			interrupt-names = "otgfs";
 			num-bidir-endpoints = <4>;
 			ram-size = <1280>;
+			maximum-speed = "full-speed";
 			status = "disabled";
 			label = "OTGFS";
 		};
diff --git a/dts/arm/st/l4/stm32l475.dtsi b/dts/arm/st/l4/stm32l475.dtsi
index 919e97b16df..ab7a6d734ee 100644
--- a/dts/arm/st/l4/stm32l475.dtsi
+++ b/dts/arm/st/l4/stm32l475.dtsi
@@ -109,6 +109,7 @@
 			interrupt-names = "otgfs";
 			num-bidir-endpoints = <6>;
 			ram-size = <1280>;
+			maximum-speed = "full-speed";
 			status = "disabled";
 			label= "OTGFS";
 		};
diff --git a/dts/arm/st/l4/stm32l4r5.dtsi b/dts/arm/st/l4/stm32l4r5.dtsi
index 3ffd4baee4a..43763f31477 100644
--- a/dts/arm/st/l4/stm32l4r5.dtsi
+++ b/dts/arm/st/l4/stm32l4r5.dtsi
@@ -116,6 +116,7 @@
 			interrupt-names = "otgfs";
 			num-bidir-endpoints = <6>;
 			ram-size = <1280>;
+			maximum-speed = "full-speed";
 			status = "disabled";
 			label= "OTGFS";
 		};
diff --git a/soc/arm/st_stm32/stm32f2/dts_fixup.h b/soc/arm/st_stm32/stm32f2/dts_fixup.h
index 3e4b48647bc..e7558f71483 100644
--- a/soc/arm/st_stm32/stm32f2/dts_fixup.h
+++ b/soc/arm/st_stm32/stm32f2/dts_fixup.h
@@ -43,5 +43,6 @@
 #define CONFIG_USB_IRQ_PRI			ST_STM32_OTGFS_50000000_IRQ_OTGFS_PRIORITY
 #define CONFIG_USB_NUM_BIDIR_ENDPOINTS		ST_STM32_OTGFS_50000000_NUM_BIDIR_ENDPOINTS
 #define CONFIG_USB_RAM_SIZE			ST_STM32_OTGFS_50000000_RAM_SIZE
+#define CONFIG_USB_MAXIMUM_SPEED		ST_STM32_OTGFS_50000000_MAXIMUM_SPEED
 
 /* End of SoC Level DTS fixup file */