diff --git a/ChangeLog b/ChangeLog
index 9d6ddb2..741273a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2003-01-14  Adam Fedor  <fedor@gnu.org>
+
+	* configure.ac: Check for GLX_RGBA_TYPE in glx.h
+
 2003-01-14  Fred Kiefer <FredKiefer@gmx.de>
 
 	* Source/xdps/NSDPSContext.m
diff --git a/configure b/configure
index 447277f..ba33bfe 100755
--- a/configure
+++ b/configure
@@ -4634,7 +4634,28 @@ echo "${ECHO_T}$ac_cv_header_GL_glx_h" >&6
 fi
 
 
-   if test "$have_glx" = yes -a "$ac_cv_header_GL_glx_h" = yes; then
+   echo "$as_me:$LINENO: checking for GLX_RGBA_TYPE" >&5
+echo $ECHO_N "checking for GLX_RGBA_TYPE... $ECHO_C" >&6
+   cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+#include "confdefs.h"
+#include <GL/glx.h>
+      #ifdef GLX_RGBA_TYPE
+        yes
+      #endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  egrep "yes" >/dev/null 2>&1; then
+  have_glx_rgba=yes
+else
+  have_glx_rgba=no
+fi
+rm -f conftest*
+
+   echo "$as_me:$LINENO: result: $have_glx_rgba" >&5
+echo "${ECHO_T}$have_glx_rgba" >&6
+   if test "$have_glx" = yes -a "$ac_cv_header_GL_glx_h" = yes -a "$have_glx_rgba" = yes; then
      GRAPHIC_LIBS="-lGL ${GRAPHIC_LIBS}"
      WITH_GLX=yes
 
diff --git a/configure.ac b/configure.ac
index ffc1560..ae9962a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -209,7 +209,15 @@ if test "x$enable_glx" = "xyes"; then
    LIBS="${GRAPHIC_LIBS} ${LIBS}"
    AC_CHECK_LIB(GL, glXMakeContextCurrent, have_glx=yes, have_glx=no)
    AC_CHECK_HEADER(GL/glx.h)
-   if test "$have_glx" = yes -a "$ac_cv_header_GL_glx_h" = yes; then
+   AC_MSG_CHECKING([for GLX_RGBA_TYPE])
+   AC_EGREP_CPP(yes, 
+     [#include <GL/glx.h>
+      #ifdef GLX_RGBA_TYPE
+        yes
+      #endif
+      ], have_glx_rgba=yes, have_glx_rgba=no)
+   AC_MSG_RESULT([$have_glx_rgba])
+   if test "$have_glx" = yes -a "$ac_cv_header_GL_glx_h" = yes -a "$have_glx_rgba" = yes; then
      GRAPHIC_LIBS="-lGL ${GRAPHIC_LIBS}"
      WITH_GLX=yes
      AC_DEFINE(HAVE_GLX,1,[Define if you have the glx library])