diff --git a/src/runtime/sys_windows_386.s b/src/runtime/sys_windows_386.s
index e3fd90e05f..be4268a9c0 100644
--- a/src/runtime/sys_windows_386.s
+++ b/src/runtime/sys_windows_386.s
@@ -400,7 +400,9 @@ TEXT runtime·switchtothread(SB),NOSPLIT,$0
 	MOVL	BP, SP
 	RET
 
-// See https://www.dcl.hpi.uni-potsdam.de/research/WRK/2007/08/getting-os-information-the-kuser_shared_data-structure/
+// See https://wrkhpi.wordpress.com/2007/08/09/getting-os-information-the-kuser_shared_data-structure/
+// Archived copy at:
+// http://web.archive.org/web/20210411000829/https://wrkhpi.wordpress.com/2007/08/09/getting-os-information-the-kuser_shared_data-structure/
 // Must read hi1, then lo, then hi2. The snapshot is valid if hi1 == hi2.
 #define _INTERRUPT_TIME 0x7ffe0008
 #define _SYSTEM_TIME 0x7ffe0014
diff --git a/src/runtime/sys_windows_amd64.s b/src/runtime/sys_windows_amd64.s
index 099894efe7..1fd8bf5c5c 100644
--- a/src/runtime/sys_windows_amd64.s
+++ b/src/runtime/sys_windows_amd64.s
@@ -440,7 +440,9 @@ TEXT runtime·switchtothread(SB),NOSPLIT|NOFRAME,$0
 	MOVQ	32(SP), SP
 	RET
 
-// See https://www.dcl.hpi.uni-potsdam.de/research/WRK/2007/08/getting-os-information-the-kuser_shared_data-structure/
+// See https://wrkhpi.wordpress.com/2007/08/09/getting-os-information-the-kuser_shared_data-structure/
+// Archived copy at:
+// http://web.archive.org/web/20210411000829/https://wrkhpi.wordpress.com/2007/08/09/getting-os-information-the-kuser_shared_data-structure/
 // Must read hi1, then lo, then hi2. The snapshot is valid if hi1 == hi2.
 #define _INTERRUPT_TIME 0x7ffe0008
 #define _SYSTEM_TIME 0x7ffe0014
diff --git a/src/runtime/sys_windows_arm.s b/src/runtime/sys_windows_arm.s
index 22c6d63bdd..72de89dc84 100644
--- a/src/runtime/sys_windows_arm.s
+++ b/src/runtime/sys_windows_arm.s
@@ -416,7 +416,9 @@ TEXT runtime·read_tls_fallback(SB),NOSPLIT|NOFRAME,$0
 	MOVW	R0, (R0)
 	RET
 
-// See http://www.dcl.hpi.uni-potsdam.de/research/WRK/2007/08/getting-os-information-the-kuser_shared_data-structure/
+// See https://wrkhpi.wordpress.com/2007/08/09/getting-os-information-the-kuser_shared_data-structure/
+// Archived copy at:
+// http://web.archive.org/web/20210411000829/https://wrkhpi.wordpress.com/2007/08/09/getting-os-information-the-kuser_shared_data-structure/
 // Must read hi1, then lo, then hi2. The snapshot is valid if hi1 == hi2.
 #define _INTERRUPT_TIME 0x7ffe0008
 #define _SYSTEM_TIME 0x7ffe0014
diff --git a/src/runtime/sys_windows_arm64.s b/src/runtime/sys_windows_arm64.s
index 0b77e6d048..f54c868b26 100644
--- a/src/runtime/sys_windows_arm64.s
+++ b/src/runtime/sys_windows_arm64.s
@@ -470,7 +470,9 @@ TEXT runtime·switchtothread(SB),NOSPLIT,$16-0
 	ADD	$16, RSP
 	RET
 
-// See http://www.dcl.hpi.uni-potsdam.de/research/WRK/2007/08/getting-os-information-the-kuser_shared_data-structure/
+// See https://wrkhpi.wordpress.com/2007/08/09/getting-os-information-the-kuser_shared_data-structure/
+// Archived copy at:
+// http://web.archive.org/web/20210411000829/https://wrkhpi.wordpress.com/2007/08/09/getting-os-information-the-kuser_shared_data-structure/
 // Must read hi1, then lo, then hi2. The snapshot is valid if hi1 == hi2.
 #define _INTERRUPT_TIME 0x7ffe0008
 #define _SYSTEM_TIME 0x7ffe0014