--- configure.ac.pthread	2016-02-18 11:40:40.177797402 +0100
+++ configure.ac	2016-02-18 11:41:34.232609836 +0100
@@ -193,7 +193,7 @@
 fi
 AC_SUBST(SQLITE_THREADSAFE)
 
-if test "$SQLITE_THREADSAFE" = "1"; then
+if test "$SQLITE_THREADSAFE" = "1" -a "$SQLITE_OS_UNIX" = "1" ; then
   AC_SEARCH_LIBS(pthread_create, pthread)
   AC_SEARCH_LIBS(pthread_mutexattr_init, pthread)
 fi