diff --git a/src/configure.in b/src/configure.in
index 21a5f80..6a1a56f 100644
--- a/src/configure.in
+++ b/src/configure.in
@@ -1901,7 +1901,7 @@
   cppflags_save=$CPPFLAGS
   CPPFLAGS="$CPPFLAGS $X_CFLAGS"
   AC_CHECK_HEADERS(Xm/Xm.h Xm/XpmP.h Xm/JoinSideT.h Xm/TraitP.h Xm/Manager.h \
-		   Xm/UnhighlightT.h)
+		   Xm/UnhighlightT.h Xm/Notebook.h)
 
   if test $ac_cv_header_Xm_XpmP_h = yes; then
     dnl Solaris uses XpmAttributes_21, very annoying.