diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6bb53bcb3c..8bcb86bd1f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1060,7 +1060,7 @@ if (LIBMMDB_FOUND)
 endif ()
 
 set(USE_KRB5 false)
-if (${CMAKE_SYSTEM_NAME} MATCHES Linux)
+if (NOT ${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
     find_package(LibKrb5)
     if (LIBKRB5_FOUND)
         set(USE_KRB5 true)