diff --git a/target/linux/ar7/patches-3.18/100-fix-highmem-offset.patch b/target/linux/ar7/patches-3.18/100-fix-highmem-offset.patch
new file mode 100644
index 0000000000..f1a7549786
--- /dev/null
+++ b/target/linux/ar7/patches-3.18/100-fix-highmem-offset.patch
@@ -0,0 +1,11 @@
+--- a/arch/mips/include/asm/mach-ar7/spaces.h
++++ b/arch/mips/include/asm/mach-ar7/spaces.h
+@@ -20,6 +20,8 @@
+ #define UNCAC_BASE	_AC(0xb4000000, UL)	/* 0xa0000000 + PHYS_OFFSET */
+ #define IO_BASE		UNCAC_BASE
+ 
++#define HIGHMEM_START	_AC(0x20000000, UL)
++
+ #include <asm/mach-generic/spaces.h>
+ 
+ #endif /* __ASM_AR7_SPACES_H */
diff --git a/target/linux/ar7/patches-4.1/100-fix-highmem-offset.patch b/target/linux/ar7/patches-4.1/100-fix-highmem-offset.patch
new file mode 100644
index 0000000000..f1a7549786
--- /dev/null
+++ b/target/linux/ar7/patches-4.1/100-fix-highmem-offset.patch
@@ -0,0 +1,11 @@
+--- a/arch/mips/include/asm/mach-ar7/spaces.h
++++ b/arch/mips/include/asm/mach-ar7/spaces.h
+@@ -20,6 +20,8 @@
+ #define UNCAC_BASE	_AC(0xb4000000, UL)	/* 0xa0000000 + PHYS_OFFSET */
+ #define IO_BASE		UNCAC_BASE
+ 
++#define HIGHMEM_START	_AC(0x20000000, UL)
++
+ #include <asm/mach-generic/spaces.h>
+ 
+ #endif /* __ASM_AR7_SPACES_H */