--- a/src/libmowgli/platform/machine.h
+++ b/src/libmowgli/platform/machine.h
@@ -192,7 +192,7 @@
 # endif
 #endif
 
-#if defined __linux || defined __linux__
+#if defined __linux || defined __linux__ || defined __FreeBSD_kernel__
 # define MOWGLI_OS_LINUX
 # define MOWGLI_OS linux
 # define MOWGLI_OS_THREADS_POSIX