diff --git a/source/simulation2/components/CCmpFootprint.cpp b/source/simulation2/components/CCmpFootprint.cpp
index 1911428f15..e40c5bd38a 100644
--- a/source/simulation2/components/CCmpFootprint.cpp
+++ b/source/simulation2/components/CCmpFootprint.cpp
@@ -170,6 +170,9 @@ public:
 		if (cmpSpawnedObstruction)
 		{
 			spawnedRadius = cmpSpawnedObstruction->GetSize();
+			// Force a positive radius to avoid division by zero errors.
+			if (spawnedRadius == 0)
+				spawnedRadius = 1;
 			spawnedTag = cmpSpawnedObstruction->GetObstruction();
 		}