diff --git a/library/server/ewsgi/specification/request/wgi_request.e b/library/server/ewsgi/specification/request/wgi_request.e
index 86e1e489..d8b77a4c 100644
--- a/library/server/ewsgi/specification/request/wgi_request.e
+++ b/library/server/ewsgi/specification/request/wgi_request.e
@@ -604,6 +604,11 @@ feature -- HTTP_*
 		deferred
 		end
 
+	http_if_match: detachable READABLE_STRING_8
+			-- Existance check on resource
+		deferred
+		end
+
 feature -- Extra CGI environment variables
 
 	request_uri: READABLE_STRING_8
diff --git a/library/server/ewsgi/src/implementation/wgi_request_from_table.e b/library/server/ewsgi/src/implementation/wgi_request_from_table.e
index 79fb3007..9f2fdec4 100644
--- a/library/server/ewsgi/src/implementation/wgi_request_from_table.e
+++ b/library/server/ewsgi/src/implementation/wgi_request_from_table.e
@@ -248,6 +248,12 @@ feature -- Access: HTTP_* CGI meta parameters - 1.1
 			Result := meta_string_variable ({WGI_META_NAMES}.http_access_control_request_headers)
 		end
 
+	http_if_match: detachable READABLE_STRING_8
+			-- Existance check on resource
+		do
+			Result := meta_string_variable ({WGI_META_NAMES}.http_if_match)
+		end
+
 feature -- Access: Extension to CGI meta parameters - 1.1
 
 	request_uri: READABLE_STRING_8
diff --git a/library/server/wsf/src/wsf_request.e b/library/server/wsf/src/wsf_request.e
index 7371842f..f460180a 100644
--- a/library/server/wsf/src/wsf_request.e
+++ b/library/server/wsf/src/wsf_request.e
@@ -1045,7 +1045,7 @@ feature -- HTTP_*
 	http_if_match: detachable READABLE_STRING_8
 			-- Existence check on resource
 		do
-			Result := meta_string_variable ({WGI_META_NAMES}.http_if_match)
+			Result := wgi_request.http_if_match
 		end
 
 feature -- Extra CGI environment variables