diff --git a/sim/or1k/ChangeLog b/sim/or1k/ChangeLog
index 89cf42a642..1b7e6e2c17 100644
--- a/sim/or1k/ChangeLog
+++ b/sim/or1k/ChangeLog
@@ -1,3 +1,7 @@
+2021-01-11  Mike Frysinger  <vapier@gentoo.org>
+
+	* sim-main.h: Include config.h.
+
 2021-01-11  Mike Frysinger  <vapier@gentoo.org>
 
 	* config.in, configure: Regenerate.
diff --git a/sim/or1k/sim-main.h b/sim/or1k/sim-main.h
index f91a351a2d..cac1abb2b8 100644
--- a/sim/or1k/sim-main.h
+++ b/sim/or1k/sim-main.h
@@ -21,6 +21,8 @@
 
 #define WITH_SCACHE_PBB 1
 
+#include "config.h"
+
 #include "ansidecl.h"
 #include "or1k-desc.h"
 #include "sim-basics.h"