diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index fef25e3b..220d8809 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -57,9 +57,9 @@ endif()
 
 if(WIN32)
   if(PAHO_WITH_LIBRESSL)
-    set(LIBS_SYSTEM ws2_32 crypt32 RpcRT4 bcrypt)
+    set(LIBS_SYSTEM ws2_32 crypt32 rpcrt4 bcrypt)
   else()
-    set(LIBS_SYSTEM ws2_32 crypt32 RpcRT4)
+    set(LIBS_SYSTEM ws2_32 crypt32 rpcrt4)
   endif()
 elseif(UNIX)
   if(CMAKE_SYSTEM_NAME MATCHES "Linux")