diff --git a/bin/tools/Makefile.am b/bin/tools/Makefile.am
index 04072560dc..d7b8e4a331 100644
--- a/bin/tools/Makefile.am
+++ b/bin/tools/Makefile.am
@@ -47,7 +47,7 @@ if HAVE_LMDB
 bin_PROGRAMS +=			\
 	named-nzd2nzf
 
-named_nzd2nzf_CFLAGS =		\
+named_nzd2nzf_CPPFLAGS =		\
 	$(AM_CPPFLAGS)		\
 	$(LMDB_CFLAGS)
 
diff --git a/doc/misc/Makefile.am b/doc/misc/Makefile.am
index 4b88580b12..7481632e96 100644
--- a/doc/misc/Makefile.am
+++ b/doc/misc/Makefile.am
@@ -55,8 +55,8 @@ MAINTAINERCLEANFILES = $(OPTIONS_FILES)
 
 noinst_PROGRAMS = cfg_test
 
-cfg_test_CFLAGS =			\
-	$(AM_CFLAGS)			\
+cfg_test_CPPFLAGS =			\
+	$(AM_CPPFLAGS)			\
 	$(LIBISC_CFLAGS)		\
 	$(LIBDNS_CFLAGS)		\
 	$(LIBISCCFG_CFLAGS)