diff --git a/libguile/filesys.c b/libguile/filesys.c
index 5ca9b309c..556feba88 100644
--- a/libguile/filesys.c
+++ b/libguile/filesys.c
@@ -61,6 +61,7 @@
 #include <sys/select.h>
 #endif
 
+#include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
 
diff --git a/libguile/posix.c b/libguile/posix.c
index 11136be1d..803b2b922 100644
--- a/libguile/posix.c
+++ b/libguile/posix.c
@@ -64,6 +64,7 @@
 #include <sys/select.h>
 #endif
 
+#include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>