diff --git a/war/pom.xml b/war/pom.xml
index fa9d4986a7ba70f0a335582b8ec89d575f6565b4..88e07b1936e27bbb582afab20447c9e4e63b299d 100644
--- a/war/pom.xml
+++ b/war/pom.xml
@@ -489,6 +489,11 @@ THE SOFTWARE.
               <name>stapler.trace</name>
               <value>true</value>
             </systemProperty>
+            <systemProperty>
+              <!-- show the full stack trace on errors (the oops page) -->
+              <name>jenkins.model.Jenkins.SHOW_STACK_TRACE</name>
+              <value>true</value>
+            </systemProperty>
             <systemProperty>
               <!-- always reload scripts during debugging -->
               <name>hudson.script.noCache</name>