diff --git a/common/CMakeLists.txt b/common/CMakeLists.txt
index 38413187..3a8031b1 100644
--- a/common/CMakeLists.txt
+++ b/common/CMakeLists.txt
@@ -48,6 +48,7 @@ INCLUDE_DIRECTORIES(${PROTOBUF_INCLUDE_DIR})
 INCLUDE_DIRECTORIES(${CMAKE_CURRENT_BINARY_DIR})
 
 add_library(cockatrice_common ${common_SOURCES} ${common_HEADERS_MOC})
+# Without this check, Linux will put -pthread out of order in link.txt and build will fail
 if (UNIX)
     target_link_libraries(cockatrice_common cockatrice_protocol pthread)
 else (UNIX)