diff --git a/lwlib/lwlib-Xaw.c b/lwlib/lwlib-Xaw.c
index 07dc41e730d..214548da97e 100644
--- a/lwlib/lwlib-Xaw.c
+++ b/lwlib/lwlib-Xaw.c
@@ -24,6 +24,8 @@ Boston, MA 02111-1307, USA.  */
 
 #include <stdio.h>
 
+#include "../src/lisp.h"
+
 #include "lwlib-Xaw.h"
 
 #include <X11/StringDefs.h>
diff --git a/lwlib/lwlib-Xlw.c b/lwlib/lwlib-Xlw.c
index 7a565595774..fc59c5652b1 100644
--- a/lwlib/lwlib-Xlw.c
+++ b/lwlib/lwlib-Xlw.c
@@ -22,6 +22,8 @@ Boston, MA 02111-1307, USA.  */
 #include <config.h>
 #endif
 
+#include "../src/lisp.h"
+
 #include "lwlib-Xlw.h"
 #include <X11/StringDefs.h>
 #include <X11/IntrinsicP.h>
diff --git a/lwlib/lwlib-Xm.c b/lwlib/lwlib-Xm.c
index 766d3554e24..26aa9536c40 100644
--- a/lwlib/lwlib-Xm.c
+++ b/lwlib/lwlib-Xm.c
@@ -31,6 +31,8 @@ Boston, MA 02111-1307, USA.  */
 #include <X11/CoreP.h>
 #include <X11/CompositeP.h>
 
+#include "../src/lisp.h"
+
 #include "lwlib-Xm.h"
 #include "lwlib-utils.h"
 
diff --git a/lwlib/lwlib-Xol.c b/lwlib/lwlib-Xol.c
index d34e70e1324..b89bf243653 100644
--- a/lwlib/lwlib-Xol.c
+++ b/lwlib/lwlib-Xol.c
@@ -1,3 +1,6 @@
+
+#include "../src/lisp.h"
+
 #include "lwlib-Xol.h"
 #include <X11/StringDefs.h>
 #include <X11/IntrinsicP.h>
diff --git a/lwlib/lwlib-Xolmb.c b/lwlib/lwlib-Xolmb.c
index a49e8ab5405..cc63ebcd39e 100644
--- a/lwlib/lwlib-Xolmb.c
+++ b/lwlib/lwlib-Xolmb.c
@@ -18,6 +18,9 @@ along with GNU Emacs; see the file COPYING.  If not, write to
 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 Boston, MA 02111-1307, USA.  */
 
+
+#include "../src/lisp.h"
+
 #include <X11/IntrinsicP.h>
 #include <X11/Intrinsic.h>
 #include <X11/CompositeP.h>
diff --git a/lwlib/lwlib-utils.c b/lwlib/lwlib-utils.c
index dcc0b42ca54..5cc39bcca7e 100644
--- a/lwlib/lwlib-utils.c
+++ b/lwlib/lwlib-utils.c
@@ -29,6 +29,8 @@ Boston, MA 02111-1307, USA.  */
 #undef index
 #undef rindex
 
+#include "../src/lisp.h"
+
 #include <X11/Xatom.h>
 #include <X11/IntrinsicP.h>
 #include <X11/ObjectP.h>
diff --git a/lwlib/xlwmenu.c b/lwlib/xlwmenu.c
index 8c2d5c8b5f1..3561fb966ba 100644
--- a/lwlib/xlwmenu.c
+++ b/lwlib/xlwmenu.c
@@ -24,6 +24,8 @@ Boston, MA 02111-1307, USA.  */
 #include <config.h>
 #endif
 
+#include "../src/lisp.h"
+
 #include <stdio.h>
 
 #include <sys/types.h>