diff --git a/src/libs/ifc/xml/vpatternconverter.cpp b/src/libs/ifc/xml/vpatternconverter.cpp
index ab86535da..f3a4af8c7 100644
--- a/src/libs/ifc/xml/vpatternconverter.cpp
+++ b/src/libs/ifc/xml/vpatternconverter.cpp
@@ -302,6 +302,7 @@ void VPatternConverter::ApplyPatches()
             case (0x000309):
                 ToV0_4_0();
                 ValidateXML(XSDSchema(0x000400), fileName);
+                V_FALLTHROUGH
             case (0x000400):
                 break;
             default: