diff --git a/nd4j/nd4j-backends/nd4j-api-parent/nd4j-api/src/main/java/org/nd4j/imports/converters/ImportClassMapping.java b/nd4j/nd4j-backends/nd4j-api-parent/nd4j-api/src/main/java/org/nd4j/imports/converters/ImportClassMapping.java
index fcf3fe630..2fd2e6332 100644
--- a/nd4j/nd4j-backends/nd4j-api-parent/nd4j-api/src/main/java/org/nd4j/imports/converters/ImportClassMapping.java
+++ b/nd4j/nd4j-backends/nd4j-api-parent/nd4j-api/src/main/java/org/nd4j/imports/converters/ImportClassMapping.java
@@ -581,8 +581,14 @@ public class ImportClassMapping {
             org.nd4j.linalg.api.ops.random.impl.ProbablisticMerge.class,
             org.nd4j.linalg.api.ops.random.impl.Range.class,
             org.nd4j.linalg.api.ops.random.impl.TruncatedNormalDistribution.class,
-            org.nd4j.linalg.api.ops.random.impl.UniformDistribution.class
-
+            org.nd4j.linalg.api.ops.random.impl.UniformDistribution.class,
+            org.nd4j.linalg.api.ops.custom.AdjustContrast.class,
+            org.nd4j.linalg.api.ops.custom.AdjustContrastV2.class,
+            org.nd4j.linalg.api.ops.custom.BitCast.class,
+            org.nd4j.linalg.api.ops.custom.CompareAndBitpack.class,
+            org.nd4j.linalg.api.ops.custom.DivideNoNan.class,
+            org.nd4j.linalg.api.ops.custom.DrawBoundingBoxes.class,
+            org.nd4j.linalg.api.ops.custom.FakeQuantWithMinMaxVarsPerChannel.class
     );
 
     static {
diff --git a/nd4j/nd4j-backends/nd4j-api-parent/nd4j-api/src/main/java/org/nd4j/linalg/api/ops/custom/BaseAdjustContrast.java b/nd4j/nd4j-backends/nd4j-api-parent/nd4j-api/src/main/java/org/nd4j/linalg/api/ops/custom/BaseAdjustContrast.java
index fe14fe69c..cadef80e6 100644
--- a/nd4j/nd4j-backends/nd4j-api-parent/nd4j-api/src/main/java/org/nd4j/linalg/api/ops/custom/BaseAdjustContrast.java
+++ b/nd4j/nd4j-backends/nd4j-api-parent/nd4j-api/src/main/java/org/nd4j/linalg/api/ops/custom/BaseAdjustContrast.java
@@ -22,8 +22,4 @@ public abstract class BaseAdjustContrast extends DynamicCustomOp {
     public BaseAdjustContrast(SameDiff sameDiff, SDVariable[] vars) {
         super("", sameDiff, vars);
     }
-
-    public BaseAdjustContrast(SameDiff sameDiff, SDVariable in, SDVariable factor, SDVariable out) {
-        super(null, sameDiff, new SDVariable[]{in, factor, out});
-    }
 }
\ No newline at end of file