diff --git a/kernel/x86_64/KERNEL.PRESCOTT b/kernel/x86_64/KERNEL.PRESCOTT
index 9b3e514d1..c8011219d 100644
--- a/kernel/x86_64/KERNEL.PRESCOTT
+++ b/kernel/x86_64/KERNEL.PRESCOTT
@@ -19,7 +19,7 @@ DGEMMINCOPYOBJ =
 DGEMMITCOPYOBJ =
 DGEMMONCOPYOBJ =  dgemm_oncopy$(TSUFFIX).$(SUFFIX)
 DGEMMOTCOPYOBJ =  dgemm_otcopy$(TSUFFIX).$(SUFFIX)
-CGEMMKERNEL    =  zgemm_kernel_4x2_sse3.S
+CGEMMKERNEL    =  zgemm_kernel_4x2_penryn.S
 CGEMMINCOPY    =  ../generic/zgemm_ncopy_4.c
 CGEMMITCOPY    =  ../generic/zgemm_tcopy_4.c
 CGEMMONCOPY    =  zgemm_ncopy_2.S