diff --git a/www/apache2/Makefile b/www/apache2/Makefile
index 2acca795e91f..c919f4092518 100644
--- a/www/apache2/Makefile
+++ b/www/apache2/Makefile
@@ -111,6 +111,8 @@ BROKEN=				"apr is installed and may conflict with apache one\
 .   endif
 .endif
 
+WITH_PTHREAD_LIBS?=	${PTHREAD_LIBS:S/-l//}
+
 .include "${APACHEDIR}/Makefile.doc"
 .include "${APACHEDIR}/Makefile.modules"
 
diff --git a/www/apache2/Makefile.modules b/www/apache2/Makefile.modules
index 59eba703fe77..d172ac3e8175 100644
--- a/www/apache2/Makefile.modules
+++ b/www/apache2/Makefile.modules
@@ -172,6 +172,9 @@ _APACHE_MODULES+=	${LDAP_MODULES}
 .if defined(WITH_THREADS)
 CONFIGURE_ARGS+=	--enable-threads
 CFLAGS+=		-DFREEBSD_THREAD_HACK
+.   if defined(WITH_EXPERIMENTAL_THREADS)
+CONFIGURE_ARGS+=	ac_cv_pthreads_lib=${WITH_PTHREAD_LIBS}
+.   endif
 .   if !defined(WITH_CUSTOM_THREADS)
 _APACHE_MODULES+=	${THREAD_MODULES}
 .   else
diff --git a/www/apache20/Makefile b/www/apache20/Makefile
index 2acca795e91f..c919f4092518 100644
--- a/www/apache20/Makefile
+++ b/www/apache20/Makefile
@@ -111,6 +111,8 @@ BROKEN=				"apr is installed and may conflict with apache one\
 .   endif
 .endif
 
+WITH_PTHREAD_LIBS?=	${PTHREAD_LIBS:S/-l//}
+
 .include "${APACHEDIR}/Makefile.doc"
 .include "${APACHEDIR}/Makefile.modules"
 
diff --git a/www/apache20/Makefile.modules b/www/apache20/Makefile.modules
index 59eba703fe77..d172ac3e8175 100644
--- a/www/apache20/Makefile.modules
+++ b/www/apache20/Makefile.modules
@@ -172,6 +172,9 @@ _APACHE_MODULES+=	${LDAP_MODULES}
 .if defined(WITH_THREADS)
 CONFIGURE_ARGS+=	--enable-threads
 CFLAGS+=		-DFREEBSD_THREAD_HACK
+.   if defined(WITH_EXPERIMENTAL_THREADS)
+CONFIGURE_ARGS+=	ac_cv_pthreads_lib=${WITH_PTHREAD_LIBS}
+.   endif
 .   if !defined(WITH_CUSTOM_THREADS)
 _APACHE_MODULES+=	${THREAD_MODULES}
 .   else