diff --git a/Makefile.am b/Makefile.am
index a3952ce78d2..7a3a0247217 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -4660,7 +4660,9 @@ krb5_child_SOURCES = \
     src/sss_client/common.c \
     src/krb5_plugin/common/utils.c \
     src/krb5_plugin/idp/idp_utils.c \
+if BUILD_PASSKEY
     src/krb5_plugin/passkey/passkey_utils.c \
+endif # BUILD_PASSKEY
     $(NULL)
 krb5_child_CFLAGS = \
     $(AM_CFLAGS) \