diff --git a/lib/writer/progress-stream.js b/lib/writer/progress-stream.js
index cb95400a..3854c78e 100644
--- a/lib/writer/progress-stream.js
+++ b/lib/writer/progress-stream.js
@@ -70,7 +70,10 @@ class ProgressStream extends Stream.Transform {
       this.state.remaining = this.state.length - this.state.transferred
       this.state.runtime = Date.now() - this.start
       this.state.speed = this.meter(this.state.delta)
-      this.state.eta = this.state.remaining / this.state.speed
+
+      // NOTE: We need to guard against this becoming Infinity,
+      // because that value isn't transmitted properly over IPC and becomes `null`
+      this.state.eta = this.state.speed ? this.state.remaining / this.state.speed : 0
       this.delta = 0
       this.emit('progress', this.state)
     }