Index: docs/LibASTMatchersReference.html
===================================================================
--- docs/LibASTMatchersReference.html
+++ docs/LibASTMatchersReference.html
@@ -1872,6 +1872,11 @@
 integerLiteral(equals(42))
   matches 42
 
+Note that you cannot directly match negative integers, as clang does
+not have that notion. To match -3, use:
+ unaryOperator(hasOperatorName("-"),
+               hasUnaryOperand(integerLiteral(equals(13))))
+
 Usable as: Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1CharacterLiteral.html">CharacterLiteral</a>&gt;, Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1CXXBoolLiteralExpr.html">CXXBoolLiteralExpr</a>&gt;,
            Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1FloatingLiteral.html">FloatingLiteral</a>&gt;, Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1IntegerLiteral.html">IntegerLiteral</a>&gt;
 </pre></td></tr>
@@ -2327,6 +2332,11 @@
 integerLiteral(equals(42))
   matches 42
 
+Note that you cannot directly match negative integers, as clang does
+not have that notion. To match -3, use:
+ unaryOperator(hasOperatorName("-"),
+               hasUnaryOperand(integerLiteral(equals(13))))
+
 Usable as: Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1CharacterLiteral.html">CharacterLiteral</a>&gt;, Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1CXXBoolLiteralExpr.html">CXXBoolLiteralExpr</a>&gt;,
            Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1FloatingLiteral.html">FloatingLiteral</a>&gt;, Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1IntegerLiteral.html">IntegerLiteral</a>&gt;
 </pre></td></tr>
@@ -2583,6 +2593,11 @@
 integerLiteral(equals(42))
   matches 42
 
+Note that you cannot directly match negative integers, as clang does
+not have that notion. To match -3, use:
+ unaryOperator(hasOperatorName("-"),
+               hasUnaryOperand(integerLiteral(equals(13))))
+
 Usable as: Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1CharacterLiteral.html">CharacterLiteral</a>&gt;, Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1CXXBoolLiteralExpr.html">CXXBoolLiteralExpr</a>&gt;,
            Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1FloatingLiteral.html">FloatingLiteral</a>&gt;, Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1IntegerLiteral.html">IntegerLiteral</a>&gt;
 </pre></td></tr>
@@ -2866,6 +2881,11 @@
 integerLiteral(equals(42))
   matches 42
 
+Note that you cannot directly match negative integers, as clang does
+not have that notion. To match -3, use:
+ unaryOperator(hasOperatorName("-"),
+               hasUnaryOperand(integerLiteral(equals(13))))
+
 Usable as: Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1CharacterLiteral.html">CharacterLiteral</a>&gt;, Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1CXXBoolLiteralExpr.html">CXXBoolLiteralExpr</a>&gt;,
            Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1FloatingLiteral.html">FloatingLiteral</a>&gt;, Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1IntegerLiteral.html">IntegerLiteral</a>&gt;
 </pre></td></tr>
Index: include/clang/ASTMatchers/ASTMatchers.h
===================================================================
--- include/clang/ASTMatchers/ASTMatchers.h
+++ include/clang/ASTMatchers/ASTMatchers.h
@@ -3821,6 +3821,11 @@
 /// integerLiteral(equals(42))
 ///   matches 42
 ///
+/// Note that you cannot directly match negative integers, as clang does
+/// not have that notion. To match -3, use:
+///  unaryOperator(hasOperatorName("-"),
+///                hasUnaryOperand(integerLiteral(equals(13))))
+///
 /// Usable as: Matcher<CharacterLiteral>, Matcher<CXXBoolLiteralExpr>,
 ///            Matcher<FloatingLiteral>, Matcher<IntegerLiteral>
 template <typename ValueT>
Index: unittests/ASTMatchers/ASTMatchersNodeTest.cpp
===================================================================
--- unittests/ASTMatchers/ASTMatchersNodeTest.cpp
+++ unittests/ASTMatchers/ASTMatchersNodeTest.cpp
@@ -666,6 +666,12 @@
   EXPECT_TRUE(notMatches("int i = 'a';", HasIntLiteral));
   EXPECT_TRUE(notMatches("int i = 1e10;", HasIntLiteral));
   EXPECT_TRUE(notMatches("int i = 10.0;", HasIntLiteral));
+
+  // Negative integers.
+  EXPECT_TRUE(matches("int i = -10;",
+                      unaryOperator(
+                          hasOperatorName("-"),
+                          hasUnaryOperand(integerLiteral(equals(10))))));
 }
 
 TEST(Matcher, FloatLiterals) {