diff --git a/lib/krb5/Makefile.am b/lib/krb5/Makefile.am
index 584fd9904..f3c01c1df 100644
--- a/lib/krb5/Makefile.am
+++ b/lib/krb5/Makefile.am
@@ -147,7 +147,7 @@ libkrb5_la_SOURCES =				\
 	write_message.c				\
 	$(ERR_FILES)
 
-libkrb5_la_LDFLAGS = -version-info 18:4:1
+libkrb5_la_LDFLAGS = -version-info 21:0:4
 
 $(libkrb5_la_OBJECTS): $(srcdir)/krb5-protos.h $(srcdir)/krb5-private.h