diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -92,8 +92,6 @@
         MD_MAINPAGE "${CMAKE_SOURCE_DIR}/README.md"
         LINK_QCHS
             Qt5Core_QCH
-        PREDEFINED_MACROS
-            DOXYGEN_PREPROC
         BLANK_MACROS
             KI18N_EXPORT
             KI18N_DEPRECATED_EXPORT
diff --git a/src/klocalizedstring.h b/src/klocalizedstring.h
--- a/src/klocalizedstring.h
+++ b/src/klocalizedstring.h
@@ -649,7 +649,7 @@
 // Do not document every multi-argument i18n* call separately,
 // but provide special quasi-calls that only Doxygen sees.
 // Placed in front of ki18n* calls, because i18n* are more basic.
-#ifdef DOXYGEN_PREPROC
+#ifdef DOXYGEN_SHOULD_SKIP_THIS
 
 /**
  * Translate a string and substitute any arguments.
@@ -850,7 +850,7 @@
                  const char *context, const char *singular, const char *plural,
                  const TYPE &arg...);
 
-#endif // DOXYGEN_PREPROC
+#endif // DOXYGEN_SHOULD_SKIP_THIS
 
 /**
  * Create non-finalized translated string.
@@ -1090,7 +1090,7 @@
     }
 }
 
-#ifndef DOXYGEN_PREPROC
+#ifndef DOXYGEN_SHOULD_SKIP_THIS
 
 #ifndef NDEBUG
 #define I18N_ERR_MSG String_literal_as_second_argument_to_i18n___Perhaps_you_need_i18nc_or_i18np
@@ -1956,11 +1956,11 @@
 }
 // <<<<< End of markup-aware context-plural calls with domain
 
-#endif // DOXYGEN_PREPROC
+#endif // DOXYGEN_SHOULD_SKIP_THIS
 
 #endif // KLOCALIZEDSTRING_H
 
-#ifndef DOXYGEN_PREPROC
+#ifndef DOXYGEN_SHOULD_SKIP_THIS
 
 // Outside of include guards, to be able to map and unmap domains
 // by successive inclusions of this header
@@ -2005,4 +2005,4 @@
 #undef tr2xi18n
 #endif
 
-#endif // DOXYGEN_PREPROC
+#endif // DOXYGEN_SHOULD_SKIP_THIS