diff --git a/panda/src/gles2gsg/gles2gsg.h b/panda/src/gles2gsg/gles2gsg.h
index d09bbc5d19..55ddb45ae9 100644
--- a/panda/src/gles2gsg/gles2gsg.h
+++ b/panda/src/gles2gsg/gles2gsg.h
@@ -67,6 +67,7 @@ typedef char GLchar;
 #define GL_RENDERBUFFER_BLUE_SIZE_EXT GL_RENDERBUFFER_BLUE_SIZE
 #define GL_RENDERBUFFER_ALPHA_SIZE_EXT GL_RENDERBUFFER_ALPHA_SIZE
 #define GL_RENDERBUFFER_DEPTH_SIZE_EXT GL_RENDERBUFFER_DEPTH_SIZE
+#define GL_RENDERBUFFER_STENCIL_SIZE_EXT GL_RENDERBUFFER_STENCIL_SIZE
 #define GL_FRAMEBUFFER_EXT GL_FRAMEBUFFER
 #define GL_DRAW_FRAMEBUFFER_EXT GL_FRAMEBUFFER
 #define GL_READ_FRAMEBUFFER_EXT GL_FRAMEBUFFER
diff --git a/panda/src/glesgsg/glesgsg.h b/panda/src/glesgsg/glesgsg.h
index 9549866972..4163d3360d 100644
--- a/panda/src/glesgsg/glesgsg.h
+++ b/panda/src/glesgsg/glesgsg.h
@@ -72,6 +72,7 @@
 #define GL_RENDERBUFFER_BLUE_SIZE_EXT GL_RENDERBUFFER_BLUE_SIZE_OES
 #define GL_RENDERBUFFER_ALPHA_SIZE_EXT GL_RENDERBUFFER_ALPHA_SIZE_OES
 #define GL_RENDERBUFFER_DEPTH_SIZE_EXT GL_RENDERBUFFER_DEPTH_SIZE_OES
+#define GL_RENDERBUFFER_STENCIL_SIZE_EXT GL_RENDERBUFFER_STENCIL_SIZE_OES
 #define GL_FRAMEBUFFER_EXT GL_FRAMEBUFFER_OES
 #define GL_DRAW_FRAMEBUFFER_EXT GL_FRAMEBUFFER_OES
 #define GL_READ_FRAMEBUFFER_EXT GL_FRAMEBUFFER_OES