2 files changed, 9 insertions, 7 deletions
diff --git a/src/util.c b/src/util.c
index b421660..cda7468 100644
--- a/src/util.c
+++ b/src/util.c
@@ -15,7 +15,6 @@
 */
 
 #define _POSIX_SOURCE 1  /* for wordexp, fileno */
-#define _BSD_SOURCE   1  /* for lockf */
 
 #include <assert.h>
 #include <errno.h>
@@ -28,6 +27,10 @@
 #include <sys/types.h>
 #include <unistd.h>
 
+#if defined(HAVE_FLOCK) && defined(HAVE_FILENO)
+#    include <sys/file.h>
+#endif
+
 #include "lilv_internal.h"
 
 #ifdef HAVE_WORDEXP
@@ -354,8 +357,8 @@ lilv_path_is_child(const char* path, const char* dir)
 int
 lilv_flock(FILE* file, bool lock)
 {
-#if defined(HAVE_LOCKF) && defined(HAVE_FILENO)
-	return lockf(fileno(file), lock ? F_LOCK : F_ULOCK, 0);
+#if defined(HAVE_FLOCK) && defined(HAVE_FILENO)
+	return flock(fileno(file), lock ? LOCK_EX : LOCK_UN);
 #else
 	return 0;
 #endif
diff --git a/wscript b/wscript
index 4d9de86..730c814 100644
--- a/wscript
+++ b/wscript
@@ -86,10 +86,9 @@ def configure(conf):
                   define_name='HAVE_WORDEXP',
                   mandatory=False)
 
-    conf.check_cc(function_name='lockf',
-                  header_name='unistd.h',
-                  defines='_BSD_SOURCE',
-                  define_name='HAVE_LOCKF',
+    conf.check_cc(function_name='flock',
+                  header_name='sys/file.h',
+                  define_name='HAVE_FLOCK',
                   mandatory=False)
 
     conf.check_cc(function_name='fileno',