diff --git a/gfx_es2/gl_state.cpp b/gfx_es2/gl_state.cpp
index 53fc98733a..367e61f72c 100644
--- a/gfx_es2/gl_state.cpp
+++ b/gfx_es2/gl_state.cpp
@@ -59,6 +59,13 @@ void CheckGLExtensions() {
 
 	const char *extString = (const char *)glGetString(GL_EXTENSIONS);
 
+#ifdef WIN32
+	const char *wglString = wglGetExtensionsStringEXT();
+	gl_extensions.EXT_swap_control_tear = strstr(wglString, "WGL_EXT_swap_control_tear") != 0;
+#elif !defined(USING_GLES2)
+	// const char *glXString = glXQueryExtensionString();
+	// gl_extensions.EXT_swap_control_tear = strstr(glXString, "GLX_EXT_swap_control_tear") != 0;
+#endif
 	gl_extensions.OES_packed_depth_stencil = strstr(extString, "GL_OES_packed_depth_stencil") != 0;
 	gl_extensions.OES_depth24 = strstr(extString, "GL_OES_depth24") != 0;
 	gl_extensions.OES_depth_texture = strstr(extString, "GL_OES_depth_texture") != 0;
diff --git a/gfx_es2/gl_state.h b/gfx_es2/gl_state.h
index cb72e5a0ae..a325cb916b 100644
--- a/gfx_es2/gl_state.h
+++ b/gfx_es2/gl_state.h
@@ -207,6 +207,7 @@ struct GLExtensions {
 	bool EXT_discard_framebuffer;
 	bool FBO_ARB;
 	bool FBO_EXT;
+	bool EXT_swap_control_tear;
 };
 
 extern GLExtensions gl_extensions;