Index: lld/COFF/SymbolTable.cpp
===================================================================
--- lld/COFF/SymbolTable.cpp
+++ lld/COFF/SymbolTable.cpp
@@ -591,7 +591,10 @@
   s->isUsedInRegularObj = true;
   if (wasInserted || isa<Undefined>(s) || s->isLazy())
     replaceSymbol<DefinedAbsolute>(s, n, sym);
-  else if (!isa<DefinedCOFF>(s))
+  else if (auto *da = dyn_cast<DefinedAbsolute>(s)) {
+    if (!da->isEqual(sym))
+      reportDuplicate(s, nullptr);
+  } else if (!isa<DefinedCOFF>(s))
     reportDuplicate(s, nullptr);
   return s;
 }
@@ -603,7 +606,10 @@
   s->isUsedInRegularObj = true;
   if (wasInserted || isa<Undefined>(s) || s->isLazy())
     replaceSymbol<DefinedAbsolute>(s, n, va);
-  else if (!isa<DefinedCOFF>(s))
+  else if (auto *da = dyn_cast<DefinedAbsolute>(s)) {
+    if (!da->isEqual(va))
+      reportDuplicate(s, nullptr);
+  } else if (!isa<DefinedCOFF>(s))
     reportDuplicate(s, nullptr);
   return s;
 }
Index: lld/COFF/Symbols.h
===================================================================
--- lld/COFF/Symbols.h
+++ lld/COFF/Symbols.h
@@ -229,6 +229,14 @@
   uint64_t getRVA() { return va - config->imageBase; }
   void setVA(uint64_t v) { va = v; }
 
+  bool isEqual(COFFSymbolRef s) const {
+    return va == s.getValue();
+  }
+
+  bool isEqual(uint64_t otherVa) const {
+    return va == otherVa;
+  }
+
   // Section index relocations against absolute symbols resolve to
   // this 16 bit number, and it is the largest valid section index
   // plus one. This variable keeps it.
Index: lld/test/COFF/duplicate-absolute-same.s
===================================================================
--- /dev/null
+++ lld/test/COFF/duplicate-absolute-same.s
@@ -0,0 +1,14 @@
+// REQUIRES: x86
+// RUN: llvm-mc -triple x86_64-windows-msvc -filetype obj -o %t.obj %s
+// RUN: echo -e ".globl myabsolute\nmyabsolute = 0" > %t.dupl.s
+// RUN: llvm-mc -triple x86_64-windows-msvc -filetype obj -o %t.dupl.obj %t.dupl.s
+// RUN: lld-link /out:%t.exe %t.obj %t.dupl.obj -subsystem:console -entry:entry 2>&1 | FileCheck --allow-empty %s
+
+// CHECK-NOT: error: duplicate symbol: myabsolute
+
+.globl myabsolute
+myabsolute = 0
+
+.globl entry
+entry:
+    ret
Index: lld/test/COFF/duplicate-absolute.s
===================================================================
--- lld/test/COFF/duplicate-absolute.s
+++ lld/test/COFF/duplicate-absolute.s
@@ -1,6 +1,6 @@
 // REQUIRES: x86
 // RUN: llvm-mc -triple x86_64-windows-msvc -filetype obj -o %t.obj %s
-// RUN: echo -e ".globl myabsolute\nmyabsolute = 0" > %t.dupl.s
+// RUN: echo -e ".globl myabsolute\nmyabsolute = 1" > %t.dupl.s
 // RUN: llvm-mc -triple x86_64-windows-msvc -filetype obj -o %t.dupl.obj %t.dupl.s
 // RUN: not lld-link /out:%t.exe %t.obj %t.dupl.obj 2>&1 | FileCheck %s