diff --git a/res/css/views/audio_messages/_PlaybackContainer.pcss b/res/css/views/audio_messages/_PlaybackContainer.pcss
index d2c101658c..67b311e967 100644
--- a/res/css/views/audio_messages/_PlaybackContainer.pcss
+++ b/res/css/views/audio_messages/_PlaybackContainer.pcss
@@ -29,6 +29,11 @@ limitations under the License.
 
     contain: content;
 
+    .mx_Waveform,
+    .mx_RecordingPlayback_timelineLayoutMiddle {
+        min-width: 0; /* Prevent a blowout */
+    }
+
     /* Waveforms are present in live recording only */
     .mx_Waveform {
         .mx_Waveform_bar {