diff --git a/Units/parser-d.r/simple.d.d/expected.tags b/Units/parser-d.r/simple.d.d/expected.tags
index 7e0eae6de6..5ee68dc4d9 100644
--- a/Units/parser-d.r/simple.d.d/expected.tags
+++ b/Units/parser-d.r/simple.d.d/expected.tags
@@ -23,6 +23,7 @@ main	input.d	/^void main(string[] args)$/;"	f	file:
 member	input.d	/^		T member;$/;"	m	class:Class.CT	file:
 modulevar	input.d	/^	int modulevar;$/;"	m	file:
 obj	input.d	/^Object obj;$/;"	v
+out_contract	input.d	/^void out_contract()$/;"	f	file:
 qar	input.d	/^		int qar;$/;"	m	union:Struct.Union	file:
 quxx	input.d	/^		bool quxx;$/;"	m	union:Struct.Union	file:
 test.simple	input.d	/^module test.simple;$/;"	M
diff --git a/Units/parser-d.r/simple.d.d/input.d b/Units/parser-d.r/simple.d.d/input.d
index baa0eef396..8f7aec8bcc 100644
--- a/Units/parser-d.r/simple.d.d/input.d
+++ b/Units/parser-d.r/simple.d.d/input.d
@@ -90,7 +90,11 @@ static assert( num < TL.length, "Name '"~name~"' is not found");
 
 __gshared int globalVar;
 
+void out_contract()
+out(r; r > 0) {}
+
 void main(string[] args)
+in(args.length > 0)
 {
 	auto foo = new Class(1337);
 
diff --git a/parsers/c-based.c b/parsers/c-based.c
index 41f52b1703..e735385cd3 100644
--- a/parsers/c-based.c
+++ b/parsers/c-based.c
@@ -2072,7 +2072,13 @@ static bool skipPostArgumentStuff (
 				{
 				case KEYWORD_ATTRIBUTE: skipParens ();  break;
 				case KEYWORD_THROW:     skipParens ();  break;
-				case KEYWORD_IF:        if (isInputLanguage (Lang_d)) skipParens ();  break;
+				case KEYWORD_IF: // D template constraint
+				// D contract expressions
+				case KEYWORD_IN:
+				case KEYWORD_OUT:
+					if (isInputLanguage (Lang_d))
+						skipParens ();
+					break;
 				case KEYWORD_TRY:                       break;
 
 				case KEYWORD_CONST: