diff --git a/NetworkPkg/HttpDxe/HttpsSupport.c b/NetworkPkg/HttpDxe/HttpsSupport.c
index ad611e7c38..7330be42c0 100644
--- a/NetworkPkg/HttpDxe/HttpsSupport.c
+++ b/NetworkPkg/HttpDxe/HttpsSupport.c
@@ -436,7 +436,7 @@ TlsConfigCertificate (
       DEBUG ((
         DEBUG_ERROR,
         "%a: truncated EFI_SIGNATURE_LIST header\n",
-        __FUNCTION__
+        __func__
         ));
       goto FreeCACert;
     }
@@ -447,7 +447,7 @@ TlsConfigCertificate (
       DEBUG ((
         DEBUG_ERROR,
         "%a: SignatureListSize too small for EFI_SIGNATURE_LIST\n",
-        __FUNCTION__
+        __func__
         ));
       goto FreeCACert;
     }
@@ -456,7 +456,7 @@ TlsConfigCertificate (
       DEBUG ((
         DEBUG_ERROR,
         "%a: truncated EFI_SIGNATURE_LIST body\n",
-        __FUNCTION__
+        __func__
         ));
       goto FreeCACert;
     }
@@ -465,7 +465,7 @@ TlsConfigCertificate (
       DEBUG ((
         DEBUG_ERROR,
         "%a: only X509 certificates are supported\n",
-        __FUNCTION__
+        __func__
         ));
       Status = EFI_UNSUPPORTED;
       goto FreeCACert;
@@ -475,7 +475,7 @@ TlsConfigCertificate (
       DEBUG ((
         DEBUG_ERROR,
         "%a: SignatureHeaderSize must be 0 for X509\n",
-        __FUNCTION__
+        __func__
         ));
       goto FreeCACert;
     }
@@ -484,7 +484,7 @@ TlsConfigCertificate (
       DEBUG ((
         DEBUG_ERROR,
         "%a: SignatureSize too small for EFI_SIGNATURE_DATA\n",
-        __FUNCTION__
+        __func__
         ));
       goto FreeCACert;
     }
@@ -495,7 +495,7 @@ TlsConfigCertificate (
       DEBUG ((
         DEBUG_ERROR,
         "%a: EFI_SIGNATURE_DATA array not a multiple of SignatureSize\n",
-        __FUNCTION__
+        __func__
         ));
       goto FreeCACert;
     }
@@ -505,7 +505,7 @@ TlsConfigCertificate (
   }
 
   if (CertCount == 0) {
-    DEBUG ((DEBUG_ERROR, "%a: no X509 certificates provided\n", __FUNCTION__));
+    DEBUG ((DEBUG_ERROR, "%a: no X509 certificates provided\n", __func__));
     goto FreeCACert;
   }
 
diff --git a/NetworkPkg/IScsiDxe/IScsiMisc.c b/NetworkPkg/IScsiDxe/IScsiMisc.c
index b3ea90158f..78dc5c73d3 100644
--- a/NetworkPkg/IScsiDxe/IScsiMisc.c
+++ b/NetworkPkg/IScsiDxe/IScsiMisc.c
@@ -875,7 +875,7 @@ IScsiCreateAttempts (
         DEBUG_ERROR,
         "%a: Failed to set 'InitialAttemptOrder' with Guid (%g): "
         "%r\n",
-        __FUNCTION__,
+        __func__,
         &gIScsiConfigGuid,
         Status
         ));
@@ -926,7 +926,7 @@ IScsiCreateAttempts (
         DEBUG_ERROR,
         "%a: Failed to set variable (mPrivate->PortString) with Guid (%g): "
         "%r\n",
-        __FUNCTION__,
+        __func__,
         &gEfiIScsiInitiatorNameProtocolGuid,
         Status
         ));