diff --git a/src/test/resources/unification/if_stmt/IfStmt.java b/src/test/resources/unification/if_stmt/IfStmt.java
index 96db258..c2bc9ab 100644
--- a/src/test/resources/unification/if_stmt/IfStmt.java
+++ b/src/test/resources/unification/if_stmt/IfStmt.java
@@ -4,7 +4,7 @@ public int sign(int x) {
             return 1;
         }
         if (x < 0) {
-            return 0;
+            return -1;
         }
         return 0;
     }