diff --git a/FindVeerProtocols.cmake b/FindVeerProtocols.cmake
index 2caa676..4a37984 100644
--- a/FindVeerProtocols.cmake
+++ b/FindVeerProtocols.cmake
@@ -13,6 +13,7 @@ if(NOT VEER_PROTOCOLS_IS_EXTERNAL_PROJECT)
     VEER_PROTOCOLS_INCLUDE_DIRS
     NAMES veer/common/ports.hpp
     PATHS ${_search_paths})
+  unset(_search_paths)
 
   if(VEER_PROTOCOLS_INCLUDE_DIRS)
     set(VEER_PROTOCOLS_FOUND TRUE)