diff --git a/src/lib.rs b/src/lib.rs
index 9378a66..db2a719 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -441,14 +441,16 @@ fn update_source_properties(
         if let Some(source) = handle.cast_to::<syz::Source3D>().expect("Failed to cast") {
             if let Some(transform) = transform {
                 let translation = transform.translation();
-                source
-                    .position()
-                    .set((
-                        translation.x as f64,
-                        translation.y as f64,
-                        translation.z as f64,
-                    ))
-                    .expect("Failed to set position");
+                if !translation.x.is_nan() && !translation.y.is_nan() && !translation.z.is_nan() {
+                    source
+                        .position()
+                        .set((
+                            translation.x as f64,
+                            translation.y as f64,
+                            translation.z as f64,
+                        ))
+                        .expect("Failed to set position");
+                }
                 let distance_model = distance_model
                     .cloned()
                     .map(|v| *v)