diff --git a/glslang/Include/Types.h b/glslang/Include/Types.h
index 3572099e..db4f0b1b 100644
--- a/glslang/Include/Types.h
+++ b/glslang/Include/Types.h
@@ -553,6 +553,7 @@ public:
     // having a constant_id is not sufficient: expressions have no id, but are still specConstant
     bool specConstant : 1;
     bool nonUniform   : 1;
+    bool explicitOffset   : 1;
 
 #ifdef GLSLANG_WEB
     bool isWriteOnly() const { return false; }
diff --git a/glslang/MachineIndependent/ParseHelper.cpp b/glslang/MachineIndependent/ParseHelper.cpp
index d8bb3cf1..d9a4d4a9 100644
--- a/glslang/MachineIndependent/ParseHelper.cpp
+++ b/glslang/MachineIndependent/ParseHelper.cpp
@@ -5141,6 +5141,7 @@ void TParseContext::setLayoutQualifier(const TSourceLoc& loc, TPublicType& publi
             profileRequires(loc, EEsProfile, 310, nullptr, feature);
         }
         publicType.qualifier.layoutOffset = value;
+        publicType.qualifier.explicitOffset = true;
         if (nonLiteral)
             error(loc, "needs a literal integer", "offset", "");
         return;