diff --git a/src/engine/instrument.h b/src/engine/instrument.h
index a00b1e426..2bc3799df 100644
--- a/src/engine/instrument.h
+++ b/src/engine/instrument.h
@@ -206,6 +206,10 @@ struct DivInstrumentSTD {
       memset(ex1Macro,0,256*sizeof(int));
       memset(ex2Macro,0,256*sizeof(int));
       memset(ex3Macro,0,256*sizeof(int));
+      memset(algMacro,0,256*sizeof(int));
+      memset(fbMacro,0,256*sizeof(int));
+      memset(fmsMacro,0,256*sizeof(int));
+      memset(amsMacro,0,256*sizeof(int));
     }
 };