diff --git a/src/BSplCLib/BSplCLib.cxx b/src/BSplCLib/BSplCLib.cxx
index e53a28df93..77decf1daa 100644
--- a/src/BSplCLib/BSplCLib.cxx
+++ b/src/BSplCLib/BSplCLib.cxx
@@ -1698,8 +1698,8 @@ Standard_Boolean  BSplCLib::PrepareInsertKnots
   {
     //gka for case when segments was produced on full period only one knot
     //was added in the end of curve
-    if(fabs(adeltaK1) <= Precision::PConfusion() && 
-      fabs(adeltaK2) <= Precision::PConfusion())
+    if(fabs(adeltaK1) <= gp::Resolution() && 
+       fabs(adeltaK2) <= gp::Resolution())
       ak++;
   }
   
diff --git a/tests/bugs/fclasses/bug25558 b/tests/bugs/fclasses/bug25558
new file mode 100644
index 0000000000..ada62c3ba9
--- /dev/null
+++ b/tests/bugs/fclasses/bug25558
@@ -0,0 +1,14 @@
+puts "========"
+puts "OCC25558"
+puts "========"
+puts ""
+##############################################
+# It is impossible to restore attached shape
+##############################################
+
+smallview
+
+restore [locate_data_file OCC25558_faulty.brep] a1
+
+fit
+set only_screen_axo 1