diff --git a/src/libs/vtools/dialogs/tools/dialogseamallowance.cpp b/src/libs/vtools/dialogs/tools/dialogseamallowance.cpp
index 8265dab82..a21408d52 100644
--- a/src/libs/vtools/dialogs/tools/dialogseamallowance.cpp
+++ b/src/libs/vtools/dialogs/tools/dialogseamallowance.cpp
@@ -1288,7 +1288,8 @@ void DialogSeamAllowance::GrainlinePinPointChanged()
     QColor color = okColor;
     const quint32 topPinId = getCurrentObjectId(ui->comboBoxGrainlineTopPin);
     const quint32 bottomPinId = getCurrentObjectId(ui->comboBoxGrainlineBottomPin);
-    if (topPinId != NULL_ID && bottomPinId != NULL_ID && topPinId != bottomPinId)
+    if ((topPinId == NULL_ID && bottomPinId == NULL_ID) ||
+        (topPinId != NULL_ID && bottomPinId != NULL_ID && topPinId != bottomPinId))
     {
         flagGPin = true;
         color = okColor;