diff --git a/src/pipewire/utils.h b/src/pipewire/utils.h
index af0b7f2f2..ff9317cb2 100644
--- a/src/pipewire/utils.h
+++ b/src/pipewire/utils.h
@@ -31,7 +31,9 @@ extern "C" {
 
 #include <string.h>
 #include <sys/un.h>
-#include <sys/mount.h>
+#ifndef _POSIX_C_SOURCE
+# include <sys/mount.h>
+#endif
 
 #include <spa/utils/defs.h>
 #include <spa/pod/pod.h>