diff --git a/src/opatIO/private/opatIO.cpp b/src/opatIO/private/opatIO.cpp
index bdbf45b..cfc648a 100644
--- a/src/opatIO/private/opatIO.cpp
+++ b/src/opatIO/private/opatIO.cpp
@@ -171,7 +171,11 @@ void OpatIO::LookupEpsilon() {
         for (int j = 1; j < static_cast<int>(header.numTables); j++) {
             epsilon = std::min(epsilon, std::fabs(tableIDToIndex.at(j).at(i) - tableIDToIndex.at(j-1).at(i)));
         }
-        indexEpsilon.at(i) = epsilon * 0.1;
+        if (epsilon < 1e-8) {
+            indexEpsilon.at(i) = 1e-8;
+        } else {
+            indexEpsilon.at(i) = epsilon * 0.1;
+        }
     }
 }