diff --git a/sys/geom/geom_bsd_enc.c b/sys/geom/geom_bsd_enc.c
index 46415b86eac5..82924978be68 100644
--- a/sys/geom/geom_bsd_enc.c
+++ b/sys/geom/geom_bsd_enc.c
@@ -46,6 +46,8 @@
 #include <sys/disklabel.h>
 #ifdef _KERNEL
 #include <sys/systm.h>
+#else
+#include <string.h>
 #endif
 
 void