diff --git a/symja_android_library/matheclipse-core/src/main/java/org/matheclipse/core/expression/AbstractFractionSym.java b/symja_android_library/matheclipse-core/src/main/java/org/matheclipse/core/expression/AbstractFractionSym.java
index 243d8c8bca..9680f7113d 100644
--- a/symja_android_library/matheclipse-core/src/main/java/org/matheclipse/core/expression/AbstractFractionSym.java
+++ b/symja_android_library/matheclipse-core/src/main/java/org/matheclipse/core/expression/AbstractFractionSym.java
@@ -435,7 +435,7 @@ public int compareTo(IExpr expr) {
         return c;
       }
       IExpr im = expr.im();
-      return !im.isPositive() ? 1 : -1;
+      return im.isPositive() ? -1 : im.isNegative() ? 1 : IExpr.compareHierarchy(this, expr);
     }
     return IExpr.compareHierarchy(this, expr);
   }
diff --git a/symja_android_library/matheclipse-core/src/main/java/org/matheclipse/core/expression/AbstractIntegerSym.java b/symja_android_library/matheclipse-core/src/main/java/org/matheclipse/core/expression/AbstractIntegerSym.java
index b748a91792..6fd107777b 100644
--- a/symja_android_library/matheclipse-core/src/main/java/org/matheclipse/core/expression/AbstractIntegerSym.java
+++ b/symja_android_library/matheclipse-core/src/main/java/org/matheclipse/core/expression/AbstractIntegerSym.java
@@ -380,7 +380,7 @@ public int compareTo(final IExpr expr) {
         return c;
       }
       IExpr im = expr.im();
-      return !im.isPositive() ? 1 : -1;
+      return im.isPositive() ? -1 : im.isNegative() ? 1 : IExpr.compareHierarchy(this, expr);
     }
     return IExpr.compareHierarchy(this, expr);
   }
diff --git a/symja_android_library/matheclipse-core/src/main/java/org/matheclipse/core/expression/Num.java b/symja_android_library/matheclipse-core/src/main/java/org/matheclipse/core/expression/Num.java
index ec04cd6357..8d97f54dff 100644
--- a/symja_android_library/matheclipse-core/src/main/java/org/matheclipse/core/expression/Num.java
+++ b/symja_android_library/matheclipse-core/src/main/java/org/matheclipse/core/expression/Num.java
@@ -231,6 +231,8 @@ public int compareTo(final IExpr expr) {
       if (c != 0) {
         return c;
       }
+      IExpr im = expr.im();
+      return im.isPositive() ? -1 : im.isNegative() ? 1 : IExpr.compareHierarchy(this, expr);
     }
     return IExpr.compareHierarchy(this, expr);
   }