diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2eeb011..e8ffcc9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -39,7 +39,6 @@ else()
   set(PROTOBUF_PURPOSE)
 endif()
 ign_find_package(IgnProtobuf
-                 VERSION ${REQ_PROTOBUF_VER}
                  PKGCONFIG protobuf
                  PKGCONFIG_VER_COMPARISON >=
                  REQUIRED