diff --git a/litex/soc/integration/soc.py b/litex/soc/integration/soc.py
index d91f7a288..0fbc544f2 100644
--- a/litex/soc/integration/soc.py
+++ b/litex/soc/integration/soc.py
@@ -318,7 +318,7 @@ class SoCBusHandler(LiteXModule):
         is_in = True
         if not (region.origin >= container.origin):
             is_in = False
-        if not ((region.origin + region.size) < (container.origin + container.size)):
+        if not ((region.origin + region.size) <= (container.origin + container.size)):
             is_in = False
         return is_in