diff --git a/lib/soft386/common.c b/lib/soft386/common.c
index 97cded25420..9f15c4e2ec0 100644
--- a/lib/soft386/common.c
+++ b/lib/soft386/common.c
@@ -597,7 +597,7 @@ Soft386InterruptInternal(PSOFT386_STATE State,
             if (!Soft386StackPush(State, OldSs)) return FALSE;
 
             /* Push stack pointer */
-            if (Soft386StackPush(State, OldEsp)) return FALSE;
+            if (!Soft386StackPush(State, OldEsp)) return FALSE;
         }
     }