diff --git a/src/coreclr/binder/applicationcontext.cpp b/src/coreclr/binder/applicationcontext.cpp
index bb399c5ffb01c0..280ecef7873243 100644
--- a/src/coreclr/binder/applicationcontext.cpp
+++ b/src/coreclr/binder/applicationcontext.cpp
@@ -80,16 +80,11 @@ namespace BINDER_SPACE
 
     HRESULT ApplicationContext::SetupBindingPaths(SString &sTrustedPlatformAssemblies,
                                                   SString &sPlatformResourceRoots,
-                                                  SString &sAppPaths,
-                                                  BOOL     fAcquireLock)
+                                                  SString &sAppPaths)
     {
         HRESULT hr = S_OK;
 
-        CRITSEC_Holder contextLock(fAcquireLock ? GetCriticalSectionCookie() : NULL);
-        if (m_pTrustedPlatformAssemblyMap != nullptr)
-        {
-            GO_WITH_HRESULT(S_OK);
-        }
+        _ASSERTE(m_pTrustedPlatformAssemblyMap == nullptr);
 
         //
         // Parse TrustedPlatformAssemblies
diff --git a/src/coreclr/binder/defaultassemblybinder.cpp b/src/coreclr/binder/defaultassemblybinder.cpp
index cf986dc9b6ab3a..ae9833f9de0d25 100644
--- a/src/coreclr/binder/defaultassemblybinder.cpp
+++ b/src/coreclr/binder/defaultassemblybinder.cpp
@@ -203,7 +203,7 @@ HRESULT DefaultAssemblyBinder::SetupBindingPaths(SString  &sTrustedPlatformAssem
 
     EX_TRY
     {
-        hr = GetAppContext()->SetupBindingPaths(sTrustedPlatformAssemblies, sPlatformResourceRoots, sAppPaths, TRUE /* fAcquireLock */);
+        hr = GetAppContext()->SetupBindingPaths(sTrustedPlatformAssemblies, sPlatformResourceRoots, sAppPaths);
     }
     EX_CATCH_HRESULT(hr);
     return hr;
@@ -231,4 +231,3 @@ HRESULT DefaultAssemblyBinder::BindToSystem(BINDER_SPACE::Assembly** ppSystemAss
 
     return hr;
 }
-
diff --git a/src/coreclr/binder/inc/applicationcontext.hpp b/src/coreclr/binder/inc/applicationcontext.hpp
index 8aad61e49f4b49..6642e68fd5f047 100644
--- a/src/coreclr/binder/inc/applicationcontext.hpp
+++ b/src/coreclr/binder/inc/applicationcontext.hpp
@@ -86,8 +86,7 @@ namespace BINDER_SPACE
 
         HRESULT SetupBindingPaths(/* in */ SString &sTrustedPlatformAssemblies,
                                   /* in */ SString &sPlatformResourceRoots,
-                                  /* in */ SString &sAppPaths,
-                                  /* in */ BOOL     fAcquireLock);
+                                  /* in */ SString &sAppPaths);
 
         // Getters/Setter
         inline ExecutionContext *GetExecutionContext();