diff --git a/rtdata/CMakeLists.txt b/rtdata/CMakeLists.txt
index e14862d7f..7ed0d95c7 100644
--- a/rtdata/CMakeLists.txt
+++ b/rtdata/CMakeLists.txt
@@ -24,7 +24,13 @@ endif()
 if(UNIX)
     configure_file("${CMAKE_CURRENT_SOURCE_DIR}/rawtherapee.desktop.in" "${CMAKE_CURRENT_BINARY_DIR}/rawtherapee.desktop")
     install(FILES "${CMAKE_CURRENT_BINARY_DIR}/rawtherapee.desktop" DESTINATION ${DESKTOPDIR})
-    install(DIRECTORY "${ICONTHEMEDIR}/hicolor" DESTINATION "${ICONSDIR}")
+    if(BUILD_BUNDLE)
+        install(DIRECTORY "${ICONTHEMEDIR}/hicolor" DESTINATION "${ICONSDIR}")
+    else()
+        # For theme 'hicolor' (containing app icon), 'index.theme' shall not be installed for Linux build with 'BUILD_BUNDLE=OFF' option
+        # (to avoid conflict with existing 'index.theme' distro file)
+        install(DIRECTORY "${ICONTHEMEDIR}/hicolor" DESTINATION "${ICONSDIR}" PATTERN "index.theme" EXCLUDE)
+    endif()
 endif()
 
 install(FILES ${LANGUAGEFILES} DESTINATION "${DATADIR}/languages")