diff --git a/grobid-core/src/main/java/org/grobid/core/jni/DeLFTModel.java b/grobid-core/src/main/java/org/grobid/core/jni/DeLFTModel.java
index a4d270d18b..5af5b34dce 100644
--- a/grobid-core/src/main/java/org/grobid/core/jni/DeLFTModel.java
+++ b/grobid-core/src/main/java/org/grobid/core/jni/DeLFTModel.java
@@ -185,6 +185,9 @@ public String label(String data) {
         } catch(ExecutionException e) {
             LOGGER.error("DeLFT model " + this.modelName + " labelling failed", e);
         }
+        // In some areas, GROBID currently expects tabs as feature separators.
+        // (Same as in WapitiModel.label)
+        result = result.replaceAll(" ", "\t");
         return result;
     }