diff --git a/gfx/gl/GLContextProviderGLX.cpp b/gfx/gl/GLContextProviderGLX.cpp
index 27d07e391d..4efca41ff8 100644
--- a/gfx/gl/GLContextProviderGLX.cpp
+++ b/gfx/gl/GLContextProviderGLX.cpp
@@ -84,7 +84,7 @@ GLXLibrary::EnsureInitialized()
         // see e.g. bug 608526: it is intrinsically interesting to know whether we have dynamically linked to libGL.so.1
         // because at least the NVIDIA implementation requires an executable stack, which causes mprotect calls,
         // which trigger glibc bug http://sourceware.org/bugzilla/show_bug.cgi?id=12225
-#ifdef __OpenBSD__
+#if defined(__OpenBSD__) || defined(__NetBSD__)
         libGLfilename = "libGL.so";
 #else
         libGLfilename = "libGL.so.1";
diff --git a/toolkit/xre/glxtest.cpp b/toolkit/xre/glxtest.cpp
index f6f1d4d9c9..714b039e50 100644
--- a/toolkit/xre/glxtest.cpp
+++ b/toolkit/xre/glxtest.cpp
@@ -161,7 +161,7 @@ void glxtest()
     fatal_error("The MOZ_AVOID_OPENGL_ALTOGETHER environment variable is defined");
 
   ///// Open libGL and load needed symbols /////
-#ifdef __OpenBSD__
+#if defined(__OpenBSD__) || defined(__NetBSD__)
   #define LIBGL_FILENAME "libGL.so"
 #else
   #define LIBGL_FILENAME "libGL.so.1"