diff --git a/java/debugger/impl/src/com/intellij/debugger/ui/breakpoints/BreakpointManager.java b/java/debugger/impl/src/com/intellij/debugger/ui/breakpoints/BreakpointManager.java
index 551cdb16bf69..e97814845175 100644
--- a/java/debugger/impl/src/com/intellij/debugger/ui/breakpoints/BreakpointManager.java
+++ b/java/debugger/impl/src/com/intellij/debugger/ui/breakpoints/BreakpointManager.java
@@ -591,7 +591,7 @@ public class BreakpointManager {
   }
 
   //used in Fabrique
-  public synchronized void addBreakpoint(Breakpoint breakpoint) {
+  public synchronized void addBreakpoint(@NotNull Breakpoint breakpoint) {
     myBreakpoints.put(breakpoint.myXBreakpoint, breakpoint);
     myBreakpointsListForIteration = null;
     breakpoint.updateUI();