diff --git a/core/src/main/java/org/jruby/RubyThread.java b/core/src/main/java/org/jruby/RubyThread.java
index f6b1f6b5a25..96a93cad1d3 100644
--- a/core/src/main/java/org/jruby/RubyThread.java
+++ b/core/src/main/java/org/jruby/RubyThread.java
@@ -886,7 +886,7 @@ public static IRubyObject pending_interrupt_p_s(ThreadContext context, IRubyObje
 
     @JRubyMethod(name = "pending_interrupt?")
     public IRubyObject pending_interrupt_p(ThreadContext context) {
-        return RubyBoolean.newBoolean(context, pendingInterruptQueue.isEmpty());
+        return RubyBoolean.newBoolean(context, !pendingInterruptQueue.isEmpty());
     }
 
     @JRubyMethod(name = "pending_interrupt?")