diff --git a/megamek/src/megamek/common/actions/WeaponAttackAction.java b/megamek/src/megamek/common/actions/WeaponAttackAction.java
index 3d5899c139c..1d682b64782 100644
--- a/megamek/src/megamek/common/actions/WeaponAttackAction.java
+++ b/megamek/src/megamek/common/actions/WeaponAttackAction.java
@@ -5173,7 +5173,8 @@ public static ToHitData processAttackerSPAs(ToHitData toHit, Entity ae, Targetab
 
         // blood stalker SPA
         if (ae.getBloodStalkerTarget() > Entity.NONE) {
-            if (ae.getBloodStalkerTarget() == target.getId()) {
+            // Issue #5275 - Attacker with bloodstalker SPA, `target` can be null if a building etc.
+            if ((target != null) && (ae.getBloodStalkerTarget() == target.getId())) {
                 toHit.addModifier(-1, Messages.getString("WeaponAttackAction.BloodStalkerTarget"));
             } else {
                 toHit.addModifier(+2, Messages.getString("WeaponAttackAction.BloodStalkerNonTarget"));