diff --git a/CMakeLists.txt b/CMakeLists.txt
index 24566266..144395d4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -250,10 +250,11 @@ if(WIN32)
   list(APPEND mi_libraries psapi shell32 user32 advapi32 bcrypt)
   set(pc_libraries "-lpsapi -lshell32 -luser32 -ladvapi32 -lbcrypt")
 else()
+  set(pc_libraries "")
   find_library(MI_LIBPTHREAD pthread)
   if (MI_LIBPTHREAD)                      
     list(APPEND mi_libraries ${MI_LIBPTHREAD})
-    set(pc_libraries "-pthread")
+    set(pc_libraries "${pc_libraries} -pthread")
   endif()
   find_library(MI_LIBRT rt)
   if(MI_LIBRT)