diff --git a/sys/arm64/include/vmparam.h b/sys/arm64/include/vmparam.h
index fee8e01f72c..b37bd823878 100644
--- a/sys/arm64/include/vmparam.h
+++ b/sys/arm64/include/vmparam.h
@@ -273,7 +273,6 @@
 extern vm_paddr_t dmap_phys_base;
 extern vm_paddr_t dmap_phys_max;
 extern vm_offset_t dmap_max_addr;
-extern vm_offset_t vm_max_kernel_address;
 
 #endif
 
diff --git a/sys/riscv/include/vmparam.h b/sys/riscv/include/vmparam.h
index 9a710b667c7..2198245d5b2 100644
--- a/sys/riscv/include/vmparam.h
+++ b/sys/riscv/include/vmparam.h
@@ -242,7 +242,6 @@
 extern vm_paddr_t dmap_phys_base;
 extern vm_paddr_t dmap_phys_max;
 extern vm_offset_t dmap_max_addr;
-extern vm_offset_t vm_max_kernel_address;
 extern vm_offset_t init_pt_va;
 #endif