diff --git a/src/gallium/frontends/glx/xlib/glx_api.c b/src/gallium/frontends/glx/xlib/glx_api.c
index 28022c87832..33fd81b9546 100644
--- a/src/gallium/frontends/glx/xlib/glx_api.c
+++ b/src/gallium/frontends/glx/xlib/glx_api.c
@@ -423,7 +423,7 @@ get_visual( Display *dpy, int scr, unsigned int depth, int xclass )
          return vis;
       }
       else {
-         free((void *) vis);
+         XFree((void *) vis);
          return NULL;
       }
    }
diff --git a/src/glx/glxcmds.c b/src/glx/glxcmds.c
index 76d3ea307c9..295b047779b 100644
--- a/src/glx/glxcmds.c
+++ b/src/glx/glxcmds.c
@@ -1116,7 +1116,7 @@ glXChooseVisual(Display * dpy, int screen, int *attribList)
                                   &visualTemplate, &i);
 
          if (newList) {
-            free(visualList);
+            XFree(visualList);
             visualList = newList;
             best_config = config;
          }