diff --git a/CMakeLists.txt b/CMakeLists.txt
index 893af0c54..92277b08d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -49,7 +49,7 @@ find_package(PkgConfig REQUIRED)
 if (APPLE)
   find_package(protobuf REQUIRED CONFIG)
 else()
-  find_package(protobuf REQUIRED)
+  find_package(Protobuf REQUIRED)
 endif()
 find_package(FFTW3)
 find_package(ALSA)