diff --git a/modules/core/src/parallel.cpp b/modules/core/src/parallel.cpp
index dc52820e71..94ea91964e 100644
--- a/modules/core/src/parallel.cpp
+++ b/modules/core/src/parallel.cpp
@@ -118,6 +118,8 @@
     #include <ppltasks.h>
 #elif defined HAVE_CONCURRENCY
     #include <ppl.h>
+#elif defined HAVE_PTHREADS_PF
+    #include <pthread.h>
 #endif