diff --git a/kernel/x86_64/KERNEL b/kernel/x86_64/KERNEL
index 5da79cc3f..bea7036c2 100644
--- a/kernel/x86_64/KERNEL
+++ b/kernel/x86_64/KERNEL
@@ -491,4 +491,3 @@ SSUMKERNEL = ../arm/sum.c
 DSUMKERNEL = ../arm/sum.c
 
 SOMATCOPY_RT = omatcopy_rt.c
-DOMATCOPY_RT = omatcopy_rt.c