diff --git a/libmisc/idmapping.h b/libmisc/idmapping.h
index e20bd60f..46d46312 100644
--- a/libmisc/idmapping.h
+++ b/libmisc/idmapping.h
@@ -7,6 +7,8 @@
 #ifndef _IDMAPPING_H_
 #define _IDMAPPING_H_
 
+#include <sys/types.h>
+
 struct map_range {
 	unsigned long upper; /* first ID inside the namespace */
 	unsigned long lower; /* first ID outside the namespace */