diff --git a/fink_science/__init__.py b/fink_science/__init__.py
index b1a1c157..dd98dce4 100644
--- a/fink_science/__init__.py
+++ b/fink_science/__init__.py
@@ -12,4 +12,4 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-__version__ = "4.9.0"
+__version__ = "4.10.0"
diff --git a/fink_science/random_forest_snia/processor.py b/fink_science/random_forest_snia/processor.py
index ac74cafb..6fbddead 100644
--- a/fink_science/random_forest_snia/processor.py
+++ b/fink_science/random_forest_snia/processor.py
@@ -183,6 +183,10 @@ def rfscore_sigmoid_full(jd, fid, magpsf, sigmapsf, cdsxmatch, ndethist, model=N
     # Make predictions
     probabilities = clf.predict_proba(test_features)
 
+    # pIa = 0.0 for objects that do not
+    # have both features non-zero.
+    probabilities[~flag] = [1.0, 0.0]
+
     # Take only probabilities to be Ia
     to_return = np.zeros(len(jd), dtype=float)
     to_return[mask] = probabilities.T[1]