diff --git a/lib/vauth/digest_sspi.c b/lib/vauth/digest_sspi.c
index f0b6780fca6f..3848abc9034b 100644
--- a/lib/vauth/digest_sspi.c
+++ b/lib/vauth/digest_sspi.c
@@ -644,7 +644,8 @@ void Curl_auth_digest_cleanup(struct digestdata *digest)
 
   /* Delete security context */
   if(digest->http_context) {
-    Curl_pSecFn->DeleteSecurityContext(digest->http_context);
+    if(Curl_pSecFn)
+      Curl_pSecFn->DeleteSecurityContext(digest->http_context);
     curlx_safefree(digest->http_context);
   }
 
diff --git a/lib/vauth/krb5_sspi.c b/lib/vauth/krb5_sspi.c
index e7491be022f8..55f903782afb 100644
--- a/lib/vauth/krb5_sspi.c
+++ b/lib/vauth/krb5_sspi.c
@@ -427,14 +427,16 @@ void Curl_auth_cleanup_gssapi(struct kerberos5data *krb5)
 {
   /* Free our security context */
   if(krb5->context) {
-    Curl_pSecFn->DeleteSecurityContext(krb5->context);
+    if(Curl_pSecFn)
+      Curl_pSecFn->DeleteSecurityContext(krb5->context);
     curlx_free(krb5->context);
     krb5->context = NULL;
   }
 
   /* Free our credentials handle */
   if(krb5->credentials) {
-    Curl_pSecFn->FreeCredentialsHandle(krb5->credentials);
+    if(Curl_pSecFn)
+      Curl_pSecFn->FreeCredentialsHandle(krb5->credentials);
     curlx_free(krb5->credentials);
     krb5->credentials = NULL;
   }
diff --git a/lib/vauth/ntlm_sspi.c b/lib/vauth/ntlm_sspi.c
index 4c41eb21f4e6..56855724c82c 100644
--- a/lib/vauth/ntlm_sspi.c
+++ b/lib/vauth/ntlm_sspi.c
@@ -324,14 +324,16 @@ void Curl_auth_cleanup_ntlm(struct ntlmdata *ntlm)
 {
   /* Free our security context */
   if(ntlm->context) {
-    Curl_pSecFn->DeleteSecurityContext(ntlm->context);
+    if(Curl_pSecFn)
+      Curl_pSecFn->DeleteSecurityContext(ntlm->context);
     curlx_free(ntlm->context);
     ntlm->context = NULL;
   }
 
   /* Free our credentials handle */
   if(ntlm->credentials) {
-    Curl_pSecFn->FreeCredentialsHandle(ntlm->credentials);
+    if(Curl_pSecFn)
+      Curl_pSecFn->FreeCredentialsHandle(ntlm->credentials);
     curlx_free(ntlm->credentials);
     ntlm->credentials = NULL;
   }
diff --git a/lib/vauth/spnego_sspi.c b/lib/vauth/spnego_sspi.c
index 1baf59320a37..97f319510b88 100644
--- a/lib/vauth/spnego_sspi.c
+++ b/lib/vauth/spnego_sspi.c
@@ -312,14 +312,16 @@ void Curl_auth_cleanup_spnego(struct negotiatedata *nego)
 {
   /* Free our security context */
   if(nego->context) {
-    Curl_pSecFn->DeleteSecurityContext(nego->context);
+    if(Curl_pSecFn)
+      Curl_pSecFn->DeleteSecurityContext(nego->context);
     curlx_free(nego->context);
     nego->context = NULL;
   }
 
   /* Free our credentials handle */
   if(nego->credentials) {
-    Curl_pSecFn->FreeCredentialsHandle(nego->credentials);
+    if(Curl_pSecFn)
+      Curl_pSecFn->FreeCredentialsHandle(nego->credentials);
     curlx_free(nego->credentials);
     nego->credentials = NULL;
   }