diff --git a/sim/common/ChangeLog b/sim/common/ChangeLog
index 4fecc8fee9f..e54afde5794 100644
--- a/sim/common/ChangeLog
+++ b/sim/common/ChangeLog
@@ -1,3 +1,7 @@
+Thu Oct 30 13:45:00 1997  Doug Evans  <devans@seba.cygnus.com>
+
+	* sim-core.h (sim_core_write_8): Define.
+
 Tue Oct 28 12:29:22 1997  Andrew Cagney  <cagney@b1.cygnus.com>
 
 	* sim-bits.h: Document ROTn macro.
diff --git a/sim/common/sim-core.h b/sim/common/sim-core.h
index f2ba3fcad9f..8209bfad0af 100644
--- a/sim/common/sim-core.h
+++ b/sim/common/sim-core.h
@@ -259,6 +259,7 @@ DECLARE_SIM_CORE_WRITE_N(unaligned,16)
 #define sim_core_write_1 sim_core_write_aligned_1
 #define sim_core_write_2 sim_core_write_aligned_2
 #define sim_core_write_4 sim_core_write_aligned_4
+#define sim_core_write_8 sim_core_write_aligned_8
 #define sim_core_write_16 sim_core_write_aligned_16
 
 #define sim_core_write_unaligned_word XCONCAT2(sim_core_write_unaligned_,WITH_TARGET_WORD_BITSIZE)