diff --git a/confluent_osdeploy/utils/clortho.c b/confluent_osdeploy/utils/clortho.c
index 3faefc8a..d2e74312 100644
--- a/confluent_osdeploy/utils/clortho.c
+++ b/confluent_osdeploy/utils/clortho.c
@@ -18,7 +18,7 @@
 
 #define MAXPACKET 1024
 
-static const char cryptalpha[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+static const char cryptalpha[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789./";
 
 unsigned char* genpasswd(int len) {
         unsigned char * passwd;