diff --git a/CMakeLists.txt b/CMakeLists.txt
index a8f024c2a..307735839 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -109,6 +109,7 @@ endif()
 # Find Qt dependencies
 
 find_package(Protobuf)
+set(Protobuf_FOUND 0)
 set_package_properties(Protobuf PROPERTIES TYPE OPTIONAL PURPOSE "Parsing of OSM PBF files.")
 
 if(ANDROID)