diff --git a/src/crypto/hcrypto/config.h b/src/crypto/hcrypto/config.h
index 8e06e488b6..0f4498ec47 100644
--- a/src/crypto/hcrypto/config.h
+++ b/src/crypto/hcrypto/config.h
@@ -23,6 +23,7 @@
  */
 
 #include <afsconfig.h>
+#include <afs/param.h>
 
 #include <errno.h>
 #include <stdio.h>