diff --git a/src/Scrutor/TypeSourceSelector.cs b/src/Scrutor/TypeSourceSelector.cs
index e3f836bd..e50415ec 100644
--- a/src/Scrutor/TypeSourceSelector.cs
+++ b/src/Scrutor/TypeSourceSelector.cs
@@ -20,11 +20,46 @@ public IImplementationTypeSelector FromAssemblyOf<T>()
         return InternalFromAssembliesOf(new[] { typeof(T) });
     }
 
+    /// <summary>
+    /// Uses the assembly that called Scrutor.
+    /// </summary>
+    /// <remarks>
+    /// <para>
+    /// Returned <see cref="Assembly"/> might not be the one expected do to (lack of) inlining.
+    /// To ensure proper assembly is resolved, use:
+    /// <code>
+    /// services.Scan(s => s.FromAssemblies(Assembly.GetExecutingAssembly())
+    /// </code>
+    /// or
+    /// <code>
+    /// var assembly = Assembly.GetCallingAssembly();
+    /// services.Scan(s => s.FromAssemblies(assembly));
+    /// </code>
+    /// </para>
+    /// </remarks>
+    [Obsolete("Misleading, as it might not always determine the correct assembly that called Scrutor. Will be removed in a future release")]
     public IImplementationTypeSelector FromCallingAssembly()
     {
         return FromAssemblies(Assembly.GetCallingAssembly());
     }
-
+    
+    /// <summary>
+    /// Always uses the Scrutor assembly.
+    /// </summary>
+    /// <remarks>
+    /// <para>
+    /// To ensure proper assembly is resolved, use:
+    /// <code>
+    /// services.Scan(s => s.FromAssemblies(Assembly.GetExecutingAssembly())
+    /// </code>
+    /// or
+    /// <code>
+    /// var assembly = Assembly.GetCallingAssembly();
+    /// services.Scan(s => s.FromAssemblies(assembly));
+    /// </code>
+    /// </para>
+    /// </remarks>
+    [Obsolete("Misleading, as it always uses Scrutor's assembly. Will be removed in a future release")]
     public IImplementationTypeSelector FromExecutingAssembly()
     {
         return FromAssemblies(Assembly.GetExecutingAssembly());