diff --git a/lib/roken/roken-common.h b/lib/roken/roken-common.h
index 730cafa14..55a0d321a 100644
--- a/lib/roken/roken-common.h
+++ b/lib/roken/roken-common.h
@@ -375,6 +375,9 @@ pid_file_delete (char **);
 int ROKEN_LIB_FUNCTION
 read_environment(const char *file, char ***env);
 
+void ROKEN_LIB_FUNCTION
+free_environment(char **, int);
+
 void ROKEN_LIB_FUNCTION
 warnerr(int doerrno, const char *fmt, va_list ap)
     __attribute__ ((format (printf, 2, 0)));