diff --git a/modules/core/src/parallel.cpp b/modules/core/src/parallel.cpp
index 95df5454c2..a4a7baf0f6 100644
--- a/modules/core/src/parallel.cpp
+++ b/modules/core/src/parallel.cpp
@@ -942,7 +942,7 @@ int getNumberOfCPUs_()
 
 #endif
 
-#if !defined(_WIN32) && !defined(__APPLE__)
+#if !defined(_WIN32) && !defined(__APPLE__) && defined(_SC_NPROCESSORS_ONLN)
 
     static unsigned cpu_count_sysconf = (unsigned)sysconf( _SC_NPROCESSORS_ONLN );
     ncpus = minNonZero(ncpus, cpu_count_sysconf);