diff --git a/jOOQ/src/main/java/org/jooq/types/DayToSecond.java b/jOOQ/src/main/java/org/jooq/types/DayToSecond.java
index c6bb5c3926..e33fa85c6e 100644
--- a/jOOQ/src/main/java/org/jooq/types/DayToSecond.java
+++ b/jOOQ/src/main/java/org/jooq/types/DayToSecond.java
@@ -691,6 +691,8 @@ public final class DayToSecond extends Number implements Interval, Comparable<Da
                 return false;
             if (seconds != other.seconds)
                 return false;
+            if (negative != other.negative && doubleValue() != 0.0)
+                return false;
             return true;
         }
         else if (obj instanceof YearToSecond)
diff --git a/jOOQ/src/main/java/org/jooq/types/YearToMonth.java b/jOOQ/src/main/java/org/jooq/types/YearToMonth.java
index ee452110ad..c6d0a7d945 100644
--- a/jOOQ/src/main/java/org/jooq/types/YearToMonth.java
+++ b/jOOQ/src/main/java/org/jooq/types/YearToMonth.java
@@ -314,6 +314,8 @@ public final class YearToMonth extends Number implements Interval, Comparable<Ye
                 return false;
             if (years != other.years)
                 return false;
+            if (negative != other.negative && intValue() != 0)
+                return false;
             return true;
         }
         else if (obj instanceof YearToSecond)