diff --git a/include/sim/sim.h b/include/sim/sim.h
index 468a63bbc201441db7cc57037e535c401184f0f5..6243bd49a123f5b21804eebdfeab45020e68c57a 100644
--- a/include/sim/sim.h
+++ b/include/sim/sim.h
@@ -26,12 +26,6 @@
 extern "C" {
 #endif
 
-/* This file is used when building stand-alone simulators, so isolate this
-   file from gdb.  */
-
-typedef unsigned int SIM_ADDR;
-
-
 /* Semi-opaque type used as result of sim_open and passed back to all
    other routines.  "desc" is short for "descriptor".
    It is up to each simulator to define `sim_state'.  */