diff --git a/cmake/modules/QtConfig.cmake b/cmake/modules/QtConfig.cmake
index 18fc3e9..fd33315 100644
--- a/cmake/modules/QtConfig.cmake
+++ b/cmake/modules/QtConfig.cmake
@@ -521,6 +521,9 @@ if (REQUIRED_ICONS)
             list(APPEND ICON_SEARCH_PATHS "${CMAKE_INSTALL_FULL_DATAROOTDIR}/icons")
             list(APPEND ICON_SEARCH_PATHS "/usr/${CMAKE_INSTALL_DATAROOTDIR}/icons") # find icons from regular prefix when
                                                                                      # cross- compiling
+            list(APPEND ICON_SEARCH_PATHS "/usr/share/icons")                        # the project might change CMAKE_…_DATAROOTDIR
+                                                                                     # to something custom so let's add one hardcoded fallback
+
             list(REMOVE_DUPLICATES ICON_SEARCH_PATHS)
             set(BUILTIN_ICONS_DIR "${CMAKE_CURRENT_BINARY_DIR}/icons")
             set(DEFAULT_THEME_INDEX_FILE "${BUILTIN_ICONS_DIR}/default/index.theme")