diff --git a/target/linux/realtek/rtl838x/target.mk b/target/linux/realtek/rtl838x/target.mk
index d78b44b717f..e776676f663 100644
--- a/target/linux/realtek/rtl838x/target.mk
+++ b/target/linux/realtek/rtl838x/target.mk
@@ -5,8 +5,6 @@ CPU_TYPE:=4kec
 BOARD:=realtek
 BOARDNAME:=Realtek MIPS RTL838X
 
-KERNEL_PATCHVER:=5.10
-
 define Target/Description
 	Build firmware images for Realtek RTL838x based boards.
 endef
diff --git a/target/linux/realtek/rtl839x/target.mk b/target/linux/realtek/rtl839x/target.mk
index 88993fad147..b2f4e9c0dd2 100644
--- a/target/linux/realtek/rtl839x/target.mk
+++ b/target/linux/realtek/rtl839x/target.mk
@@ -5,8 +5,6 @@ CPU_TYPE:=24kc
 BOARD:=realtek
 BOARDNAME:=Realtek MIPS RTL839X
 
-KERNEL_PATCHVER:=5.10
-
 define Target/Description
 	Build firmware images for Realtek RTL839x based boards.
 endef
diff --git a/target/linux/realtek/rtl930x/target.mk b/target/linux/realtek/rtl930x/target.mk
index 31b06219cab..a2b95f4db9b 100644
--- a/target/linux/realtek/rtl930x/target.mk
+++ b/target/linux/realtek/rtl930x/target.mk
@@ -5,8 +5,6 @@ CPU_TYPE:=24kc
 BOARD:=realtek
 BOARDNAME:=Realtek MIPS RTL930X
 
-KERNEL_PATCHVER:=5.10
-
 define Target/Description
 	Build firmware images for Realtek RTL930x based boards.
 endef
diff --git a/target/linux/realtek/rtl931x/target.mk b/target/linux/realtek/rtl931x/target.mk
index 39892e54842..eaa6b61214c 100644
--- a/target/linux/realtek/rtl931x/target.mk
+++ b/target/linux/realtek/rtl931x/target.mk
@@ -5,8 +5,6 @@ CPU_TYPE:=24kc
 BOARD:=realtek
 BOARDNAME:=Realtek MIPS RTL931X
 
-KERNEL_PATCHVER:=5.10
-
 define Target/Description
 	Build firmware images for Realtek RTL931x based boards.
 endef