diff --git a/bin/delv/Makefile.am b/bin/delv/Makefile.am
index 032da0e545..3c51bd8015 100644
--- a/bin/delv/Makefile.am
+++ b/bin/delv/Makefile.am
@@ -5,7 +5,8 @@ AM_CPPFLAGS +=				\
 	$(LIBISC_CFLAGS)		\
 	$(LIBDNS_CFLAGS)		\
 	$(LIBNS_CFLAGS)			\
-	$(LIBISCCFG_CFLAGS)
+	$(LIBISCCFG_CFLAGS)		\
+	$(OPENSSL_CFLAGS)
 
 AM_CPPFLAGS +=				\
 	-DSYSCONFDIR=\"${sysconfdir}\"
diff --git a/bin/dig/Makefile.am b/bin/dig/Makefile.am
index 685829f75c..3e86eeb3ff 100644
--- a/bin/dig/Makefile.am
+++ b/bin/dig/Makefile.am
@@ -5,7 +5,8 @@ AM_CPPFLAGS +=			\
 	$(LIBDNS_CFLAGS)	\
 	$(LIBISCCFG_CFLAGS)	\
 	$(LIBIDN2_CFLAGS)	\
-	$(LIBUV_CFLAGS)
+	$(LIBUV_CFLAGS)		\
+	$(OPENSSL_CFLAGS)
 
 LDADD +=			\
 	libdighost.la		\
diff --git a/lib/isccc/Makefile.am b/lib/isccc/Makefile.am
index cb70a6686b..908b51bced 100644
--- a/lib/isccc/Makefile.am
+++ b/lib/isccc/Makefile.am
@@ -27,7 +27,8 @@ libisccc_la_CPPFLAGS =		\
 	$(AM_CPPFLAGS)		\
 	$(LIBISC_CFLAGS)	\
 	$(LIBDNS_CFLAGS)	\
-	$(LIBISCCC_CFLAGS)
+	$(LIBISCCC_CFLAGS)	\
+	$(OPENSSL_CFLAGS)
 
 libisccc_la_LIBADD =	\
 	$(LIBISC_LIBS)