diff --git a/llvm/lib/IR/StructuralHash.cpp b/llvm/lib/IR/StructuralHash.cpp
index 25a43810ad027..ca58cf9e718a4 100644
--- a/llvm/lib/IR/StructuralHash.cpp
+++ b/llvm/lib/IR/StructuralHash.cpp
@@ -58,9 +58,10 @@ class StructuralHashImpl {
   }
 
   void update(const GlobalVariable &GV) {
-    // used/compiler.used don't affect analyses.
+    // Declarations and used/compiler.used don't affect analyses.
     // Same for llvm.embedded.object, which is always a metadata section.
-    if (GV.getName() == "llvm.compiler.used" || GV.getName() == "llvm.used" ||
+    if (GV.isDeclaration() ||
+        GV.getName() == "llvm.compiler.used" || GV.getName() == "llvm.used" ||
         GV.getName() == "llvm.embedded.object")
       return;
     hash(23456); // Global header
diff --git a/llvm/test/Transforms/StripDeadPrototypes/remove-global-variable-declaration.ll b/llvm/test/Transforms/StripDeadPrototypes/remove-global-variable-declaration.ll
new file mode 100644
index 0000000000000..c6ffd23cc23d2
--- /dev/null
+++ b/llvm/test/Transforms/StripDeadPrototypes/remove-global-variable-declaration.ll
@@ -0,0 +1,9 @@
+; RUN: opt -passes=strip-dead-prototypes -S -verify-analysis-invalidation < %s | FileCheck %s
+
+; The declaration of the unused global variable @.str should be removed without
+; getting any error from -verify-analysis-invalidation.
+
+; CHECK-NOT: @.str
+
+@.str = external constant [15 x i16]
+