diff --git a/common/headless_view.cpp b/common/headless_view.cpp
index 0fce22398..d38a45007 100644
--- a/common/headless_view.cpp
+++ b/common/headless_view.cpp
@@ -2,6 +2,7 @@
 #include <mbgl/util/timer.hpp>
 
 #include <stdexcept>
+#include <iostream>
 
 namespace mbgl {
 
@@ -155,6 +156,10 @@ HeadlessView::~HeadlessView() {
 #endif
 
 #if MBGL_USE_GLX
+    std::cerr << "~HeadlessView()" << '\n';
+    std::cerr << "x_display: " << x_display << '\n';
+    std::cerr << "glx_pixmap: " << glx_pixmap << '\n';
+    std::cerr << "gl_context: " << gl_context << '\n';
     glXMakeCurrent(x_display, None, NULL);
     glXDestroyContext(x_display, gl_context);
     XFree(x_info);
@@ -175,6 +180,10 @@ void HeadlessView::make_active() {
 #endif
 
 #if MBGL_USE_GLX
+    std::cerr << "make_active()" << '\n';
+    std::cerr << "x_display: " << x_display << '\n';
+    std::cerr << "glx_pixmap: " << glx_pixmap << '\n';
+    std::cerr << "gl_context: " << gl_context << '\n';
     if (!glXMakeCurrent(x_display, glx_pixmap, gl_context)) {
         fprintf(stderr, "Switching OpenGL context failed\n");
     }