diff --git a/clang-tools-extra/clang-tidy/google/ExplicitConstructorCheck.cpp b/clang-tools-extra/clang-tidy/google/ExplicitConstructorCheck.cpp
index 1605626d1427..220d31c360e4 100644
--- a/clang-tools-extra/clang-tidy/google/ExplicitConstructorCheck.cpp
+++ b/clang-tools-extra/clang-tidy/google/ExplicitConstructorCheck.cpp
@@ -89,6 +89,10 @@ void ExplicitConstructorCheck::check(const MatchFinder::MatchResult &Result) {
   if (const auto *Conversion =
       Result.Nodes.getNodeAs<CXXConversionDecl>("conversion")) {
     SourceLocation Loc = Conversion->getLocation();
+    // Ignore all macros until we learn to ignore specific ones (e.g. used in
+    // gmock to define matchers).
+    if (Loc.isMacroID())
+      return;
     diag(Loc, WarningMessage)
         << Conversion << FixItHint::CreateInsertion(Loc, "explicit ");
     return;
diff --git a/clang-tools-extra/test/clang-tidy/google-explicit-constructor.cpp b/clang-tools-extra/test/clang-tidy/google-explicit-constructor.cpp
index aac6ab62bd2a..4143e937c715 100644
--- a/clang-tools-extra/test/clang-tidy/google-explicit-constructor.cpp
+++ b/clang-tools-extra/test/clang-tidy/google-explicit-constructor.cpp
@@ -168,5 +168,11 @@ void f2() {
   if (b) {}
   (void)(F<double>*)b;
   (void)(F<double*>*)b;
-
 }
+
+#define DEFINE_STRUCT_WITH_OPERATOR_BOOL(name) \
+  struct name {                                \
+    operator bool() const;                     \
+  }
+
+DEFINE_STRUCT_WITH_OPERATOR_BOOL(H);