diff --git a/jOOQ/src/main/java/org/jooq/tools/Convert.java b/jOOQ/src/main/java/org/jooq/tools/Convert.java
index fad4a203b3..980fd7e8b3 100644
--- a/jOOQ/src/main/java/org/jooq/tools/Convert.java
+++ b/jOOQ/src/main/java/org/jooq/tools/Convert.java
@@ -126,7 +126,6 @@ public final class Convert {
         trueValues.add("ON");
         trueValues.add("enabled");
         trueValues.add("ENABLED");
-        trueValues.add("t"); //Vertica DB doesn't support any of these values rather it returns t or f
 
         falseValues.add("0");
         falseValues.add("0.0");
@@ -142,7 +141,6 @@ public final class Convert {
         falseValues.add("OFF");
         falseValues.add("disabled");
         falseValues.add("DISABLED");
-        falseValues.add("f"); //Vertica DB doesn't support any of these values rather it returns t or f
 
         TRUE_VALUES = Collections.unmodifiableSet(trueValues);
         FALSE_VALUES = Collections.unmodifiableSet(falseValues);