diff --git a/openeo-geotrellis/src/main/scala/org/openeo/geotrellis/OpenEOProcessScriptBuilder.scala b/openeo-geotrellis/src/main/scala/org/openeo/geotrellis/OpenEOProcessScriptBuilder.scala
index 1b57d447b..64bb1ca30 100644
--- a/openeo-geotrellis/src/main/scala/org/openeo/geotrellis/OpenEOProcessScriptBuilder.scala
+++ b/openeo-geotrellis/src/main/scala/org/openeo/geotrellis/OpenEOProcessScriptBuilder.scala
@@ -1118,6 +1118,7 @@ class OpenEOProcessScriptBuilder {
           case "date_shift" => dateShift(arguments)
           case "date_replace_component" => dateReplaceComponent(arguments)
           case "if" => ifProcess(arguments)
+          case "constant" if hasX => constantFunction(arguments)
           // Comparison operators
           case "gt" if hasXY => xyFunction(Greater.apply, convertBitCells = false)
           case "lt" if hasXY => xyFunction(Less.apply, convertBitCells = false)
@@ -1749,4 +1750,15 @@ class OpenEOProcessScriptBuilder {
     }
     clipFunction
   }
+
+  private def constantFunction(arguments:java.util.Map[String,Object]): OpenEOProcess = {
+    val (value, dataType) = arguments.get("x") match {
+      case x: java.lang.Short => (x, ShortConstantNoDataCellType)
+      case x: Integer => (x,IntConstantNoDataCellType)
+      case x: java.lang.Float =>(x,FloatConstantNoDataCellType)
+      case x: java.lang.Double => (x, DoubleConstantNoDataCellType)
+    }
+    resultingDataType = dataType
+    wrapSimpleProcess(createConstantTileFunction(value))
+  }
 }
diff --git a/openeo-geotrellis/src/test/java/org/openeo/geotrellis/TestOpenEOProcessScriptBuilder.java b/openeo-geotrellis/src/test/java/org/openeo/geotrellis/TestOpenEOProcessScriptBuilder.java
index 86c06058b..8054e776e 100644
--- a/openeo-geotrellis/src/test/java/org/openeo/geotrellis/TestOpenEOProcessScriptBuilder.java
+++ b/openeo-geotrellis/src/test/java/org/openeo/geotrellis/TestOpenEOProcessScriptBuilder.java
@@ -263,7 +263,11 @@ private void testLogicalComparisonWithConstant(String operator, int... expectedV
         builder.expressionStart(operator, args);
         builder.argumentStart("x");
         builder.argumentEnd();
-        builder.constantArgument("y", 10);
+        builder.argumentStart("y");
+        Map<String,Object> arg = map1("x",10);
+        builder.expressionStart("constant",arg);
+        builder.expressionEnd("constant",arg);
+        builder.argumentEnd();
         builder.expressionEnd(operator, args);
 
         Function1<Seq<Tile>, Seq<Tile>> transformation = builder.generateFunction();