diff --git a/Makefile.in b/Makefile.in
index 9212ade40..904c1c228 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -4,6 +4,7 @@ export NMAP_UPDATE_CHANNEL := $(shell grep '^\#[ \t]*define[ \t]\+NMAP_UPDATE_CH
 NMAP_NAME= Nmap
 NMAP_URL= http://nmap.org
 NMAP_PLATFORM=@host@
+datarootdir = @datarootdir@
 prefix = @prefix@
 exec_prefix = @exec_prefix@
 bindir = @bindir@
diff --git a/nbase/Makefile.in b/nbase/Makefile.in
index 170592e8d..a41b00aa0 100644
--- a/nbase/Makefile.in
+++ b/nbase/Makefile.in
@@ -1,4 +1,5 @@
 prefix = @prefix@
+datarootdir = @datarootdir@
 exec_prefix = @exec_prefix@
 bindir = @bindir@
 sbindir = @sbindir@
diff --git a/ncat/Makefile.in b/ncat/Makefile.in
index a2db03466..5abd8f19f 100644
--- a/ncat/Makefile.in
+++ b/ncat/Makefile.in
@@ -16,6 +16,7 @@
 SHELL = @SHELL@
 top_srcdir = @top_srcdir@
 VPATH = @srcdir@
+datarootdir = @datarootdir@
 libexecdir = @libexecdir@
 datadir = @datadir@
 sysconfdir = @sysconfdir@
diff --git a/nmap-update/Makefile.in b/nmap-update/Makefile.in
index adefd9f0e..98a668df6 100644
--- a/nmap-update/Makefile.in
+++ b/nmap-update/Makefile.in
@@ -1,6 +1,7 @@
 top_srcdir = @top_srcdir@
 srcdir = @srcdir@
 prefix = @prefix@
+datarootdir = @datarootdir@
 exec_prefix = @exec_prefix@
 bindir = @bindir@
 mandir = @mandir@
diff --git a/nping/Makefile.in b/nping/Makefile.in
index e0d9e53e1..fe3e7a0b9 100644
--- a/nping/Makefile.in
+++ b/nping/Makefile.in
@@ -4,6 +4,7 @@ NPING_NAME= Nping
 NPING_URL= http://nmap.org/nping
 NPING_PLATFORM=@host@
 prefix = @prefix@
+datarootdir = @datarootdir@
 exec_prefix = @exec_prefix@
 bindir = @bindir@
 sbindir = @sbindir@