diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -40,6 +40,12 @@
     add_definitions(-DHAVE_SPEECH)
 endif()
 
+if(NOT CMAKE_VERSION VERSION_LESS "3.10.0")
+  # CMake 3.9+ warns about automoc on files without Q_OBJECT, and doesn't know about other macros.
+  # 3.10+ lets us provide more macro names that require automoc.
+  list(APPEND CMAKE_AUTOMOC_MACRO_NAMES "OKULAR_EXPORT_PLUGIN")
+endif()
+
 find_package(KF5 ${KF5_REQUIRED_VERSION} REQUIRED COMPONENTS
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