diff --git a/src/bounce/dynamics/contacts/collide/collide_hulls.cpp b/src/bounce/dynamics/contacts/collide/collide_hulls.cpp
index af2a549..63ae512 100644
--- a/src/bounce/dynamics/contacts/collide/collide_hulls.cpp
+++ b/src/bounce/dynamics/contacts/collide/collide_hulls.cpp
@@ -54,7 +54,7 @@ void b3BuildEdgeContact(b3Manifold& manifold,
 	// Compute the closest points on the two lines.
 	float32 b = b3Dot(N1, N2);
 	float32 den = 1.0f - b * b;
-	if (den <= 0.0f)
+	if (den == 0.0f)
 	{
 		return;
 	}
diff --git a/src/bounce/dynamics/contacts/collide/collide_hulls_cache.cpp b/src/bounce/dynamics/contacts/collide/collide_hulls_cache.cpp
index b4d02f2..bcdc59e 100644
--- a/src/bounce/dynamics/contacts/collide/collide_hulls_cache.cpp
+++ b/src/bounce/dynamics/contacts/collide/collide_hulls_cache.cpp
@@ -63,7 +63,7 @@ static void b3RebuildEdgeContact(b3Manifold& manifold,
 	// Compute the closest points on the two lines.
 	float32 b = b3Dot(N1, N2);
 	float32 den = 1.0f - b * b;
-	if (den <= 0.0f)
+	if (den == 0.0f)
 	{
 		return;
 	}