diff --git a/glslang/MachineIndependent/ShaderLang.cpp b/glslang/MachineIndependent/ShaderLang.cpp
index f63305e1..9b3cdc6d 100755
--- a/glslang/MachineIndependent/ShaderLang.cpp
+++ b/glslang/MachineIndependent/ShaderLang.cpp
@@ -2048,6 +2048,9 @@ bool TProgram::buildReflection(int opts)
 
 unsigned TProgram::getLocalSize(int dim) const                        { return reflection->getLocalSize(dim); }
 int TProgram::getReflectionIndex(const char* name) const              { return reflection->getIndex(name); }
+int TProgram::getReflectionPipeIOIndex(const char* name, const bool inOrOut) const
+                                                                      { return reflection->getPipeIOIndex(name, inOrOut); }
+
 int TProgram::getNumUniformVariables() const                          { return reflection->getNumUniforms(); }
 const TObjectReflection& TProgram::getUniform(int index) const        { return reflection->getUniform(index); }
 int TProgram::getNumUniformBlocks() const                             { return reflection->getNumUniformBlocks(); }
diff --git a/glslang/MachineIndependent/reflection.cpp b/glslang/MachineIndependent/reflection.cpp
index f2be2ff1..9f1089de 100644
--- a/glslang/MachineIndependent/reflection.cpp
+++ b/glslang/MachineIndependent/reflection.cpp
@@ -112,6 +112,10 @@ public:
             TReflection::TMapIndexToReflection &ioItems =
                 input ? reflection.indexToPipeInput : reflection.indexToPipeOutput;
 
+
+            TReflection::TNameToIndex &ioMapper =
+                input ? reflection.pipeInNameToIndex : reflection.pipeOutNameToIndex;
+
             if (reflection.options & EShReflectionUnwrapIOBlocks) {
                 bool anonymous = IsAnonymous(name);
 
@@ -129,12 +133,13 @@ public:
                     blowUpIOAggregate(input, baseName, type);
                 }
             } else {
-                TReflection::TNameToIndex::const_iterator it = reflection.nameToIndex.find(name.c_str());
-                if (it == reflection.nameToIndex.end()) {
-                    reflection.nameToIndex[name.c_str()] = (int)ioItems.size();
+                TReflection::TNameToIndex::const_iterator it = ioMapper.find(name.c_str());
+                if (it == ioMapper.end()) {
+                    // seperate pipe i/o params from uniforms and blocks
+                    // in is only for input in first stage as out is only for last stage. check traverse in call stack.
+                    ioMapper[name.c_str()] = ioItems.size();
                     ioItems.push_back(
                         TObjectReflection(name.c_str(), type, 0, mapToGlType(type), mapToGlArraySize(type), 0));
-
                     EShLanguageMask& stages = ioItems.back().stages;
                     stages = static_cast<EShLanguageMask>(stages | 1 << intermediate.getStage());
                 } else {
diff --git a/glslang/MachineIndependent/reflection.h b/glslang/MachineIndependent/reflection.h
index e3561a9d..efdc8934 100644
--- a/glslang/MachineIndependent/reflection.h
+++ b/glslang/MachineIndependent/reflection.h
@@ -152,6 +152,20 @@ public:
     // see getIndex(const char*)
     int getIndex(const TString& name) const { return getIndex(name.c_str()); }
 
+
+    // for mapping any name to its index (only pipe input/output names)
+    int getPipeIOIndex(const char* name, const bool inOrOut) const
+    {
+        TNameToIndex::const_iterator it = inOrOut ? pipeInNameToIndex.find(name) : pipeOutNameToIndex.find(name);
+        if (it == (inOrOut ? pipeInNameToIndex.end() : pipeOutNameToIndex.end()))
+            return -1;
+        else
+            return it->second;
+    }
+
+    // see gePipeIOIndex(const char*, const bool)
+    int getPipeIOIndex(const TString& name, const bool inOrOut) const { return getPipeIOIndex(name.c_str(), inOrOut); }
+
     // Thread local size
     unsigned getLocalSize(int dim) const { return dim <= 2 ? localSize[dim] : 0; }
 
@@ -189,6 +203,8 @@ protected:
 
     TObjectReflection badReflection; // return for queries of -1 or generally out of range; has expected descriptions with in it for this
     TNameToIndex nameToIndex;        // maps names to indexes; can hold all types of data: uniform/buffer and which function names have been processed
+    TNameToIndex pipeInNameToIndex;  // maps pipe in names to indexes, this is a fix to seperate pipe I/O from uniforms and buffers.
+    TNameToIndex pipeOutNameToIndex; // maps pipe out names to indexes, this is a fix to seperate pipe I/O from uniforms and buffers.
     TMapIndexToReflection indexToUniform;
     TMapIndexToReflection indexToUniformBlock;
     TMapIndexToReflection indexToBufferVariable;
diff --git a/glslang/Public/ShaderLang.h b/glslang/Public/ShaderLang.h
index a071d78d..bb06acc0 100755
--- a/glslang/Public/ShaderLang.h
+++ b/glslang/Public/ShaderLang.h
@@ -789,6 +789,7 @@ public:
     bool buildReflection(int opts = EShReflectionDefault);
     unsigned getLocalSize(int dim) const;                  // return dim'th local size
     int getReflectionIndex(const char *name) const;
+    int getReflectionPipeIOIndex(const char* name, const bool inOrOut) const;
     int getNumUniformVariables() const;
     const TObjectReflection& getUniform(int index) const;
     int getNumUniformBlocks() const;
@@ -818,6 +819,9 @@ public:
     // can be used for glGetUniformIndices()
     int getUniformIndex(const char *name) const        { return getReflectionIndex(name); }
 
+    int getPipeIOIndex(const char *name, const bool inOrOut) const
+                                                       { return getReflectionPipeIOIndex(name, inOrOut); }
+
     // can be used for "name" part of glGetActiveUniform()
     const char *getUniformName(int index) const        { return getUniform(index).name.c_str(); }