diff --git a/common-tools/clas-analysis/src/main/java/org/jlab/analysis/efficiency/Truth.java b/common-tools/clas-analysis/src/main/java/org/jlab/analysis/efficiency/Truth.java
index 80fb2041a..94a7826a5 100644
--- a/common-tools/clas-analysis/src/main/java/org/jlab/analysis/efficiency/Truth.java
+++ b/common-tools/clas-analysis/src/main/java/org/jlab/analysis/efficiency/Truth.java
@@ -154,7 +154,7 @@ public String toTable() {
         for (int i=0; i<validPids.size(); ++i) {
             s.append(String.format("%6d",validPids.get(i)));
             for (int j=0; j<validPids.size(); ++j) {
-                if (mcTallies[validPids.indexOf(i)] > 0)
+                if (mcTallies[i] > 0)
                     s.append(String.format("%7.4f",get(validPids.get(i),validPids.get(j))));
                 else
                     s.append(String.format("%7s","-"));