diff --git a/modules/core/src/parallel.cpp b/modules/core/src/parallel.cpp
index 4459a248f2..0374876f71 100644
--- a/modules/core/src/parallel.cpp
+++ b/modules/core/src/parallel.cpp
@@ -56,7 +56,7 @@
     #include <sys/types.h>
     #if defined ANDROID
         #include <sys/sysconf.h>
-    #else
+    #elif defined __APPLE__
         #include <sys/sysctl.h>
     #endif
 #endif
diff --git a/modules/core/src/system.cpp b/modules/core/src/system.cpp
index e552723ed8..51624e18fe 100644
--- a/modules/core/src/system.cpp
+++ b/modules/core/src/system.cpp
@@ -163,8 +163,6 @@ std::wstring GetTempFileNameWinRT(std::wstring prefix)
 #include <sys/types.h>
 #if defined ANDROID
 #include <sys/sysconf.h>
-#else
-#include <sys/sysctl.h>
 #endif
 #endif
 
diff --git a/modules/highgui/src/cap_ffmpeg_impl.hpp b/modules/highgui/src/cap_ffmpeg_impl.hpp
index 24b51c7d28..3d18c6acc8 100644
--- a/modules/highgui/src/cap_ffmpeg_impl.hpp
+++ b/modules/highgui/src/cap_ffmpeg_impl.hpp
@@ -129,9 +129,9 @@ extern "C" {
     #include <unistd.h>
     #include <stdio.h>
     #include <sys/types.h>
-    #include <sys/sysctl.h>
     #include <sys/time.h>
 #if defined __APPLE__
+    #include <sys/sysctl.h>
     #include <mach/clock.h>
     #include <mach/mach.h>
 #endif