diff --git a/clang/lib/Parse/ParsePragma.cpp b/clang/lib/Parse/ParsePragma.cpp
--- a/clang/lib/Parse/ParsePragma.cpp
+++ b/clang/lib/Parse/ParsePragma.cpp
@@ -2607,6 +2607,7 @@
   Token EoF, AnnotTok;
   EoF.startToken();
   EoF.setKind(tok::eof);
+  EoF.setFlag(clang::Token::IsReinjected);
   AnnotTok.startToken();
   AnnotTok.setKind(tok::annot_pragma_ms_pragma);
   AnnotTok.setLocation(Tok.getLocation());
@@ -2614,6 +2615,7 @@
   SmallVector<Token, 8> TokenVector;
   // Suck up all of the tokens before the eod.
   for (; Tok.isNot(tok::eod); PP.Lex(Tok)) {
+    Tok.setFlag(clang::Token::IsReinjected);
     TokenVector.push_back(Tok);
     AnnotTok.setAnnotationEndLoc(Tok.getLocation());
   }
@@ -3159,6 +3161,7 @@
         break;
     }
 
+    Tok.setFlag(clang::Token::IsReinjected);
     ValueList.push_back(Tok);
     PP.Lex(Tok);
   }
@@ -3174,6 +3177,7 @@
 
   Token EOFTok;
   EOFTok.startToken();
+  EOFTok.setFlag(clang::Token::IsReinjected);
   EOFTok.setKind(tok::eof);
   EOFTok.setLocation(Tok.getLocation());
   ValueList.push_back(EOFTok); // Terminates expression for parsing.
@@ -3612,6 +3616,7 @@
           break;
       }
 
+      Tok.setFlag(clang::Token::IsReinjected);
       AttributeTokens.push_back(Tok);
       PP.Lex(Tok);
     }
@@ -3632,6 +3637,7 @@
     EOFTok.startToken();
     EOFTok.setKind(tok::eof);
     EOFTok.setLocation(EndLoc);
+    EOFTok.setFlag(clang::Token::IsReinjected);
     AttributeTokens.push_back(EOFTok);
 
     Info->Tokens =
diff --git a/clang/unittests/Tooling/Syntax/TokensTest.cpp b/clang/unittests/Tooling/Syntax/TokensTest.cpp
--- a/clang/unittests/Tooling/Syntax/TokensTest.cpp
+++ b/clang/unittests/Tooling/Syntax/TokensTest.cpp
@@ -1037,4 +1037,13 @@
               IsEmpty());
 }
 
+TEST_F(TokenCollectorTest, Pragmas) {
+  // Tokens coming from concatenations.
+  recordTokens(R"cpp(
+    void foo() {
+      #pragma unroll 4
+      for(int i=0;i<4;++i);
+    }
+  )cpp");
+}
 } // namespace