1 files changed, 2 insertions, 0 deletions
diff --git a/src/io.h b/src/io.h
index 27f145f..9edc5eb 100644
--- a/src/io.h
+++ b/src/io.h
@@ -28,6 +28,8 @@
 #include "gzstream.h"
 #include "param.h"
 
+#define tab(col) ( col ? "\t" : "")
+
 using namespace std;
 
 void ProgressBar(string str, double p, double total);