diff --git a/doomsday/engine/portable/include/gl_deferredapi.h b/doomsday/engine/portable/include/gl_deferredapi.h
index 24b5ce6d18..a3b6bcc2d6 100644
--- a/doomsday/engine/portable/include/gl_deferredapi.h
+++ b/doomsday/engine/portable/include/gl_deferredapi.h
@@ -26,12 +26,18 @@
 #ifndef LIBDENG_DEFERRED_GL_API_H
 #define LIBDENG_DEFERRED_GL_API_H
 
+#ifndef LIBDENG_DISABLE_DEFERRED_GL_API
+
 #include "sys_opengl.h"
 
-#define glEnable(x)     Deferred_glEnable(x)
-#define glDisable(x)    Deferred_glDisable(x)
+#define glEnable(x)         Deferred_glEnable(x)
+#define glDisable(x)        Deferred_glDisable(x)
+#define glDeleteTextures(x) Deferred_glDeleteTextures(x)
 
 void Deferred_glEnable(GLenum e);
 void Deferred_glDisable(GLenum e);
+void Deferred_glDeleteTextures(GLsizei num, const GLuint* names);
+
+#endif
 
 #endif // LIBDENG_DEFERRED_GL_API_H
diff --git a/doomsday/engine/portable/src/gl_deferredapi.c b/doomsday/engine/portable/src/gl_deferredapi.c
index 5204981c74..41525ea2ef 100644
--- a/doomsday/engine/portable/src/gl_deferredapi.c
+++ b/doomsday/engine/portable/src/gl_deferredapi.c
@@ -20,7 +20,7 @@
  * 02110-1301 USA</small>
  */
 
-#define LIBDENG_DEFERRED_GL_API_H // using regular GL API calls
+#define LIBDENG_DISABLE_DEFERRED_GL_API // using regular GL API calls
 
 #include "de_system.h"
 #include "gl_defer.h"