diff --git a/Common/NSError+GBError.h b/Common/NSError+GBError.h
index 59fb7a53..5d55401f 100644
--- a/Common/NSError+GBError.h
+++ b/Common/NSError+GBError.h
@@ -28,6 +28,7 @@ enum {
 	GBErrorTemplatePathNotDirectory,
 	
 	GBErrorHTMLObjectTemplateMissing = 8000,
+	GBErrorHTMLDocumentTemplateMissing,
 	GBErrorHTMLIndexTemplateMissing,
 	GBErrorHTMLHierarchyTemplateMissing,
 	
diff --git a/Generating/GBHTMLOutputGenerator.m b/Generating/GBHTMLOutputGenerator.m
index 15e676fb..21e529b6 100644
--- a/Generating/GBHTMLOutputGenerator.m
+++ b/Generating/GBHTMLOutputGenerator.m
@@ -171,6 +171,13 @@ - (BOOL)validateTemplates:(NSError **)error {
 		}
 		return NO;
 	}
+	if (!self.htmlDocumentTemplate) {
+		if (error) {
+			NSString *desc = [NSString stringWithFormat:@"Document template file 'document-template.html' is missing at '%@'!", self.templateUserPath];
+			*error = [NSError errorWithCode:GBErrorHTMLDocumentTemplateMissing description:desc reason:nil];
+		}
+		return NO;
+	}
 	if (!self.htmlIndexTemplate) {
 		if (error) {
 			NSString *desc = [NSString stringWithFormat:@"Index template file 'index-template.html' is missing at '%@'!", self.templateUserPath];