diff --git a/src/mesa/drivers/osmesa/osmesa.c b/src/mesa/drivers/osmesa/osmesa.c
index 0ec2d377172..b7672403335 100644
--- a/src/mesa/drivers/osmesa/osmesa.c
+++ b/src/mesa/drivers/osmesa/osmesa.c
@@ -515,6 +515,7 @@ new_osmesa_renderbuffer(struct gl_context *ctx, GLenum format, GLenum type)
       _mesa_init_renderbuffer(&srb->Base, name);
 
       srb->Base.ClassID = OSMESA_RENDERBUFFER_CLASS;
+      srb->Base.RefCount = 1;
       srb->Base.Delete = osmesa_delete_renderbuffer;
       srb->Base.AllocStorage = osmesa_renderbuffer_storage;