diff --git a/kernel/Makefile.L1 b/kernel/Makefile.L1
index 1153443c2..4678772f7 100644
--- a/kernel/Makefile.L1
+++ b/kernel/Makefile.L1
@@ -687,15 +687,27 @@ $(KDIR)ddot_k$(TSUFFIX).$(SUFFIX) $(KDIR)ddot_k$(TPSUFFIX).$(PSUFFIX) : $(KERNEL
 $(KDIR)qdot_k$(TSUFFIX).$(SUFFIX) $(KDIR)qdot_k$(TPSUFFIX).$(PSUFFIX) : $(KERNELDIR)/$(QDOTKERNEL) 
 	$(CC) -c $(CFLAGS) -UCOMPLEX -DXDOUBLE $< -o $@
 
-$(KDIR)dsdot_k$(TSUFFIX).$(SUFFIX) $(KDIR)dsdot_k$(TPSUFFIX).$(PSUFFIX) : $(KERNELDIR)/$(SDOTKERNEL) 
-	$(CC) -c $(CFLAGS) -UCOMPLEX -UDOUBLE -DDSDOT $< -o $@
-
 $(KDIR)sdot_k$(TSUFFIX).$(SUFFIX) $(KDIR)sdot_k$(TPSUFFIX).$(PSUFFIX) : $(KERNELDIR)/$(SDOTKERNEL) 
 	$(CC) -c $(CFLAGS) -UCOMPLEX -UDOUBLE $< -o $@
 
+ifdef DSDOTKERNEL
+
+$(KDIR)dsdot_k$(TSUFFIX).$(SUFFIX) $(KDIR)dsdot_k$(TPSUFFIX).$(PSUFFIX) : $(KERNELDIR)/$(DSDOTKERNEL) 
+	$(CC) -c $(CFLAGS) -UCOMPLEX -UDOUBLE -DDSDOT $< -o $@
+
+$(KDIR)sdsdot_k$(TSUFFIX).$(SUFFIX) $(KDIR)sdsdot_k$(TPSUFFIX).$(PSUFFIX) : $(KERNELDIR)/$(DSDOTKERNEL) 
+	$(CC) -c $(CFLAGS) -UCOMPLEX -UDOUBLE -DDSDOT $< -o $@
+
+else
+
+$(KDIR)dsdot_k$(TSUFFIX).$(SUFFIX) $(KDIR)dsdot_k$(TPSUFFIX).$(PSUFFIX) : $(KERNELDIR)/$(SDOTKERNEL) 
+	$(CC) -c $(CFLAGS) -UCOMPLEX -UDOUBLE -DDSDOT $< -o $@
+
 $(KDIR)sdsdot_k$(TSUFFIX).$(SUFFIX) $(KDIR)sdsdot_k$(TPSUFFIX).$(PSUFFIX) : $(KERNELDIR)/$(SDOTKERNEL) 
 	$(CC) -c $(CFLAGS) -UCOMPLEX -UDOUBLE -DDSDOT $< -o $@
 
+endif
+
 $(KDIR)zdotu_k$(TSUFFIX).$(SUFFIX) $(KDIR)zdotu_k$(TPSUFFIX).$(PSUFFIX) : $(KERNELDIR)/$(ZDOTKERNEL) 
 	$(CC) -c $(CFLAGS) -DCOMPLEX -DDOUBLE -UCONJ $< -o $@
 
diff --git a/kernel/x86_64/KERNEL b/kernel/x86_64/KERNEL
index e6a97152e..e6d6c25a6 100644
--- a/kernel/x86_64/KERNEL
+++ b/kernel/x86_64/KERNEL
@@ -119,9 +119,15 @@ XCOPYKERNEL = zcopy.S
 endif
 
 ifndef SDOTKERNEL
-SDOTKERNEL = ../arm/dot.c 
+SDOTKERNEL = dot_sse.S 
 endif
 
+
+ifndef DSDOTKERNEL
+DSDOTKERNEL = ../arm/dot.c 
+endif
+
+
 ifndef DDOTKERNEL
 DDOTKERNEL =  dot_sse2.S
 endif