diff --git a/bugmon/bugmon.py b/bugmon/bugmon.py
index b345c28..423cc6d 100644
--- a/bugmon/bugmon.py
+++ b/bugmon/bugmon.py
@@ -230,6 +230,14 @@ def _confirm_open(self) -> None:
 
     def _pernosco(self) -> None:
         """Attempt to record a pernosco session"""
+        if self.bug.platform.machine != "x86_64":
+            self.report("Pernosco is only supported for x86_64 bugs.")
+            if "pernosco" in self.bug.commands:
+                self.remove_command("pernosco")
+            if "pernosco-wanted" in self.bug.keywords:
+                self.bug.keywords.remove("pernosco-wanted")
+            return None
+
         config = self.detect_config()
         if config is None:
             return None
diff --git a/tests/test_bugmon.py b/tests/test_bugmon.py
index f06837c..f6e582f 100644
--- a/tests/test_bugmon.py
+++ b/tests/test_bugmon.py
@@ -4,6 +4,7 @@
 # obtain one at http://mozilla.org/MPL/2.0/.
 import pytest
 from autobisect.bisect import BisectionResult
+from fuzzfetch import Platform
 
 from bugmon import BugMonitor, ReproductionCrashed, ReproductionPassed
 from bugmon.bug import EnhancedBug
@@ -130,6 +131,20 @@ def test_bugmon_pernosco_failed_to_find_trace(
     assert caplog.messages[-1] == "Unable to identify a pernosco trace!"
 
 
+def test_bugmon_pernosco_x86(bugmon):
+    """Verify bugmon reports that pernosco is not supported for x86 bugs"""
+    bugmon.add_command("pernosco")
+    bugmon.bug.keywords.append("pernosco-wanted")
+
+    bugmon.bug._platform = Platform("Linux", "x86")
+    bugmon._pernosco()
+
+    assert len(bugmon.queue) == 1
+    assert bugmon.queue[0] == "Pernosco is only supported for x86_64 bugs."
+    assert "pernosco" not in bugmon.bug.commands
+    assert "pernosco-wanted" not in bugmon.bug.keywords
+
+
 def test_bugmon_pernosco_no_creds(browser_config, bugmon, build, caplog, mocker):
     bugmon.dry_run = False
     mocker.patch.object(bugmon, "detect_config", return_value=browser_config)