diff --git a/Makefile.inc1 b/Makefile.inc1
index 7ebe098ec452..38b3b2baa0ec 100644
--- a/Makefile.inc1
+++ b/Makefile.inc1
@@ -1307,6 +1307,9 @@ _elftoolchain_libs= lib/libelf lib/libdwarf
 .if ${MK_CDDL} != "no"
 _dtrace_tools= cddl/usr.bin/sgsmsg cddl/lib/libctf cddl/usr.bin/ctfconvert \
     cddl/usr.bin/ctfmerge
+
+${_bt}-cddl/usr.bin/ctfconvert: ${_bt}-lib/libelf ${_bt}-lib/libdwarf ${_bt}-cddl/lib/libctf
+${_bt}-cddl/usr.bin/ctfmerge: ${_bt}-lib/libelf ${_bt}-lib/libdwarf ${_bt}-cddl/lib/libctf
 .endif
 .endif