diff --git a/src/main/org/openscience/cdk/aromaticity/DaylightModel.java b/src/main/org/openscience/cdk/aromaticity/DaylightModel.java
index <HASH>..<HASH> 100644
--- a/src/main/org/openscience/cdk/aromaticity/DaylightModel.java
+++ b/src/main/org/openscience/cdk/aromaticity/DaylightModel.java
@@ -174,6 +174,8 @@ final class DaylightModel extends ElectronDonation {
                 int v = valence(element, charge);
                 if (v - bondOrderSum[i] >= 2)
                     electrons[i] = 2;
+                else
+                    electrons[i] = -1;
             }
                         
             else {
Not enough electrons - then it cannot participate.