diff --git a/src/BRepFill/BRepFill_ShapeLaw.cxx b/src/BRepFill/BRepFill_ShapeLaw.cxx
index d97efc9d80..71a9d0b0dd 100644
--- a/src/BRepFill/BRepFill_ShapeLaw.cxx
+++ b/src/BRepFill/BRepFill_ShapeLaw.cxx
@@ -161,6 +161,9 @@ void BRepFill_ShapeLaw::Init(const Standard_Boolean Build)
 	      IsReallyClosed = V1.IsSame(V2);
 	    }
 	  }
+          if (IsReallyClosed &&
+              Abs(C->FirstParameter() - First) > Precision::PConfusion())
+            IsReallyClosed = Standard_False; //trimmed curve differs
 
 	  if ((ii>1) || !IsReallyClosed ) { // Trim C
 	    Handle(Geom_TrimmedCurve) TC = new Geom_TrimmedCurve(C,First, Last);
diff --git a/tests/bugs/modalg_5/bug24920 b/tests/bugs/modalg_5/bug24920
new file mode 100644
index 0000000000..b1dcc74645
--- /dev/null
+++ b/tests/bugs/modalg_5/bug24920
@@ -0,0 +1,15 @@
+puts "=========="
+puts "OCC24920"
+puts "=========="
+puts ""
+#########################################
+# Invalid result of Pipe construction
+#########################################
+
+restore [locate_data_file bug24920_Comp.brep] c
+
+explode c
+pipe result c_1 c_2
+checkshape result
+
+set 2dviewer 1