diff --git a/lib/MC/MCAsmInfoCOFF.cpp b/lib/MC/MCAsmInfoCOFF.cpp
index 2637be7..4b426f8 100644
--- a/lib/MC/MCAsmInfoCOFF.cpp
+++ b/lib/MC/MCAsmInfoCOFF.cpp
@@ -19,7 +19,7 @@
 
 MCAsmInfoCOFF::MCAsmInfoCOFF() {
   GlobalPrefix = "_";
-  COMMDirectiveAlignmentIsInBytes = false;
+  COMMDirectiveAlignmentIsInBytes = true;
   LCOMMDirectiveSupportsAlignment = true;
   HasDotTypeDotSizeDirective = false;
   HasSingleParameterDotFile = false;