diff --git a/cde/lib/DtMrm/Makefile.am b/cde/lib/DtMrm/Makefile.am
index 820d75d91..aa5dee6ad 100644
--- a/cde/lib/DtMrm/Makefile.am
+++ b/cde/lib/DtMrm/Makefile.am
@@ -2,7 +2,8 @@ MAINTAINERCLEANFILES = Makefile.in
 
 lib_LTLIBRARIES = libDtMrm.la
 
-libDtMrm_la_CFLAGS = -I../DtTerm/Term -I../DtTerm/TermPrim -I../DtHelp
+libDtMrm_la_CFLAGS = -I../DtTerm/Term -I../DtTerm/TermPrim -I../DtHelp \
+		     @DT_INCDIR@ @DTI_INCDIR@
 
 libDtMrm_la_SOURCES = DtMrm.c