diff --git a/deps/glslang/glslang/glslang/MachineIndependent/preprocessor/Pp.cpp b/deps/glslang/glslang/glslang/MachineIndependent/preprocessor/Pp.cpp
index 711dfdd775..56c55634a8 100644
--- a/deps/glslang/glslang/glslang/MachineIndependent/preprocessor/Pp.cpp
+++ b/deps/glslang/glslang/glslang/MachineIndependent/preprocessor/Pp.cpp
@@ -1173,7 +1173,7 @@ int TPpContext::MacroExpand(TPpToken* ppToken, bool expandUndef, bool newLineOka
     case PpAtomLineMacro:
         ppToken->ival = _parseContext.getCurrentLoc().line;
         snprintf(ppToken->name, sizeof(ppToken->name), "%d", ppToken->ival);
-	pushInput(new tUngotTokenInput(this, PpAtomConstInt, ppToken));
+        UngetToken(PpAtomConstInt, ppToken);
         return 1;
 
     case PpAtomFileMacro: {
@@ -1181,14 +1181,14 @@ int TPpContext::MacroExpand(TPpToken* ppToken, bool expandUndef, bool newLineOka
             _parseContext.ppRequireExtensions(ppToken->loc, 1, &E_GL_GOOGLE_cpp_style_line_directive, "filename-based __FILE__");
         ppToken->ival = _parseContext.getCurrentLoc().string;
         strlcpy(ppToken->name, ppToken->loc.getStringNameOrNum().c_str(), sizeof(ppToken->name));
-	pushInput(new tUngotTokenInput(this, PpAtomConstInt, ppToken));
+        UngetToken(PpAtomConstInt, ppToken);
         return 1;
     }
 
     case PpAtomVersionMacro:
         ppToken->ival = _parseContext.version;
         snprintf(ppToken->name, sizeof(ppToken->name), "%d", ppToken->ival);
-	pushInput(new tUngotTokenInput(this, PpAtomConstInt, ppToken));
+        UngetToken(PpAtomConstInt, ppToken);
         return 1;
 
     default:
@@ -1223,7 +1223,7 @@ int TPpContext::MacroExpand(TPpToken* ppToken, bool expandUndef, bool newLineOka
                 token = scanToken(ppToken);
         }
         if (token != '(') {
-	    pushInput(new tUngotTokenInput(this, token, ppToken));
+            UngetToken(token, ppToken);
             delete in;
             return 0;
         }
diff --git a/deps/glslang/glslang/glslang/MachineIndependent/preprocessor/PpContext.h b/deps/glslang/glslang/glslang/MachineIndependent/preprocessor/PpContext.h
index efc2a9df38..8bf82b52d0 100755
--- a/deps/glslang/glslang/glslang/MachineIndependent/preprocessor/PpContext.h
+++ b/deps/glslang/glslang/glslang/MachineIndependent/preprocessor/PpContext.h
@@ -406,6 +406,7 @@ protected:
     // From PpTokens.cpp
     //
     void pushTokenStreamInput(TokenStream&, bool pasting = false);
+    void UngetToken(int token, TPpToken*);
 
     class tTokenInput : public tInput {
     public:
diff --git a/deps/glslang/glslang/glslang/MachineIndependent/preprocessor/PpTokens.cpp b/deps/glslang/glslang/glslang/MachineIndependent/preprocessor/PpTokens.cpp
index 839bd28df4..5c887c43d3 100755
--- a/deps/glslang/glslang/glslang/MachineIndependent/preprocessor/PpTokens.cpp
+++ b/deps/glslang/glslang/glslang/MachineIndependent/preprocessor/PpTokens.cpp
@@ -83,6 +83,11 @@ NVIDIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #ifndef _CRT_SECURE_NO_WARNINGS
 #define _CRT_SECURE_NO_WARNINGS
 #endif
+#if (defined(_MSC_VER) && _MSC_VER < 1900 /*vs2015*/)
+#ifndef snprintf
+#define snprintf sprintf_s
+#endif
+#endif
 
 #include <cstdlib>
 #include <cstring>
@@ -158,7 +163,8 @@ int TPpContext::TokenStream::getSubtoken()
 {
     if (current < data.size())
         return data[current++];
-    return EndOfInput;
+    else
+        return EndOfInput;
 }
 
 // back up one position in the stream
@@ -341,4 +347,9 @@ int TPpContext::tUngotTokenInput::scan(TPpToken* ppToken)
     return ret;
 }
 
+void TPpContext::UngetToken(int token, TPpToken* ppToken)
+{
+    pushInput(new tUngotTokenInput(this, token, ppToken));
+}
+
 } // end namespace glslang