diff --git a/CMakeLists.txt b/CMakeLists.txt
index dc10c28..f22acc6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,7 +7,7 @@ set (Protobuf_USE_STATIC_LIBS TRUE)
 
 function (execute_perf_protobuf)
 
-  find_package(Protobuf REQUIRED)
+  find_package(protobuf REQUIRED)
 
   add_library(perf_proto
     third_party/perf_data_converter/src/quipper/perf_data.proto