diff --git a/extensions/wikidata/src/org/openrefine/wikidata/schema/WbQuantityExpr.java b/extensions/wikidata/src/org/openrefine/wikidata/schema/WbQuantityExpr.java
index 597a2dc98..237c7152c 100644
--- a/extensions/wikidata/src/org/openrefine/wikidata/schema/WbQuantityExpr.java
+++ b/extensions/wikidata/src/org/openrefine/wikidata/schema/WbQuantityExpr.java
@@ -66,6 +66,7 @@ public class WbQuantityExpr implements WbExpression<QuantityValue> {
         BigDecimal parsedAmount = null;
         try {
             parsedAmount = new BigDecimal(amount.getString());
+            parsedAmount = new BigDecimal(parsedAmount.toPlainString());
         } catch (NumberFormatException e) {
             throw new SkipSchemaExpressionException();
         }
diff --git a/extensions/wikidata/tests/src/org/openrefine/wikidata/commands/PreviewWikibaseSchemaCommandTest.java b/extensions/wikidata/tests/src/org/openrefine/wikidata/commands/PreviewWikibaseSchemaCommandTest.java
index f042f2c48..d1026a28c 100644
--- a/extensions/wikidata/tests/src/org/openrefine/wikidata/commands/PreviewWikibaseSchemaCommandTest.java
+++ b/extensions/wikidata/tests/src/org/openrefine/wikidata/commands/PreviewWikibaseSchemaCommandTest.java
@@ -59,7 +59,7 @@ public class PreviewWikibaseSchemaCommandTest extends SchemaCommandTest {
 
         JSONObject response = ParsingUtilities.evaluateJsonStringToObject(writer.toString());
         JSONArray edits = response.getJSONArray("edits_preview");
-        assertEquals(4, edits.length());
+        assertEquals(3, edits.length());
     }
 
 }
diff --git a/extensions/wikidata/tests/src/org/openrefine/wikidata/schema/WbQuantityExprTest.java b/extensions/wikidata/tests/src/org/openrefine/wikidata/schema/WbQuantityExprTest.java
index 43fde338b..5515c5d8f 100644
--- a/extensions/wikidata/tests/src/org/openrefine/wikidata/schema/WbQuantityExprTest.java
+++ b/extensions/wikidata/tests/src/org/openrefine/wikidata/schema/WbQuantityExprTest.java
@@ -23,6 +23,8 @@
  ******************************************************************************/
 package org.openrefine.wikidata.schema;
 
+import static org.junit.Assert.assertEquals;
+
 import java.math.BigDecimal;
 
 import org.openrefine.wikidata.schema.exceptions.SkipSchemaExpressionException;
@@ -30,6 +32,9 @@ import org.testng.annotations.Test;
 import org.wikidata.wdtk.datamodel.helpers.Datamodel;
 import org.wikidata.wdtk.datamodel.interfaces.QuantityValue;
 
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
 public class WbQuantityExprTest extends WbExpressionTest<QuantityValue> {
 
     private WbQuantityExpr exprWithUnit = new WbQuantityExpr(new WbStringVariable("column A"),
@@ -43,6 +48,7 @@ public class WbQuantityExprTest extends WbExpressionTest<QuantityValue> {
         evaluatesTo(Datamodel.makeQuantityValue(new BigDecimal("4.00"), null, null, "1"), exprWithoutUnit);
     }
 
+    @Test
     public void testInvalidAmountWithoutUnit() {
         setRow("hello");
         isSkipped(exprWithoutUnit);
@@ -57,16 +63,26 @@ public class WbQuantityExprTest extends WbExpressionTest<QuantityValue> {
                 exprWithUnit);
     }
 
+    @Test
     public void testInvalidAmountWithUnit()
             throws SkipSchemaExpressionException {
         setRow("invalid", recon("Q42"));
         isSkipped(exprWithUnit);
     }
 
+    @Test
     public void testInvalidUnitWithAmount()
             throws SkipSchemaExpressionException {
         setRow("56.094", "not reconciled");
         isSkipped(exprWithUnit);
     }
+    
+    // for issue #341: https://github.com/Wikidata/Wikidata-Toolkit/issues/341
+    @Test
+    public void testExponent() throws SkipSchemaExpressionException, JsonProcessingException {
+        setRow("38.4E+3", recon("Q42"));
+        QuantityValue val = exprWithUnit.evaluate(ctxt);
+        assertEquals("38400", val.getNumericValue().toString());
+    }
 
 }