diff --git a/hw/dmx/dmx.c b/hw/dmx/dmx.c
index 0ae14a21b..4c7808de1 100644
--- a/hw/dmx/dmx.c
+++ b/hw/dmx/dmx.c
@@ -438,7 +438,7 @@ ProcDMXChangeScreensAttributes(ClientPtr client)
         value_list += count;
     }
 
-#if PANORAMIX
+#ifdef PANORAMIX
     status = dmxConfigureScreenWindows(stuff->screenCount,
                                        screen_list, attribs, &errorScreen);
 #endif
@@ -748,7 +748,7 @@ ProcDMXChangeDesktopAttributes(ClientPtr client)
     dmxGetDesktopAttributes(&attr);
     dmxFetchDesktopAttributes(stuff->valueMask, &attr, value_list);
 
-#if PANORAMIX
+#ifdef PANORAMIX
     status = dmxConfigureDesktop(&attr);
 #endif
     if (status == BadValue)
diff --git a/hw/dmx/dmxinit.c b/hw/dmx/dmxinit.c
index d1ffcc538..8f17f4ddf 100644
--- a/hw/dmx/dmxinit.c
+++ b/hw/dmx/dmxinit.c
@@ -640,7 +640,7 @@ InitOutput(ScreenInfo * pScreenInfo, int argc, char *argv[])
     for (i = 0; i < dmxNumScreens; i++)
         dmxDisplayInit(&dmxScreens[i]);
 
-#if PANORAMIX
+#ifdef PANORAMIX
     /* Register a Xinerama callback which will run from within
      * PanoramiXCreateConnectionBlock.  We can use the callback to
      * determine if Xinerama is loaded and to check the visuals