diff --git a/kcheckpass/checkpass_shadow.c b/kcheckpass/checkpass_shadow.c
index ec3a4e02a..850bf06d4 100644
--- a/kcheckpass/checkpass_shadow.c
+++ b/kcheckpass/checkpass_shadow.c
@@ -34,6 +34,7 @@
 #include <string.h>
 #include <stdlib.h>
 #include <pwd.h>
+#include <crypt.h>
 
 #ifndef __hpux
 #include <shadow.h>