diff --git a/libiberty/d-demangle.c b/libiberty/d-demangle.c
index f2d6946ecad..2e52eff7617 100644
--- a/libiberty/d-demangle.c
+++ b/libiberty/d-demangle.c
@@ -699,6 +699,15 @@ dlang_function_args (string *decl, const char *mangled, struct dlang_info *info)
 
       switch (*mangled)
 	{
+	case 'I': /* in(T) */
+	  mangled++;
+	  string_append (decl, "in ");
+	  if (*mangled == 'K') /* in ref(T) */
+	    {
+	      mangled++;
+	      string_append (decl, "ref ");
+	    }
+	  break;
 	case 'J': /* out(T) */
 	  mangled++;
 	  string_append (decl, "out ");
@@ -826,7 +835,6 @@ dlang_type (string *decl, const char *mangled, struct dlang_info *info)
       mangled = dlang_function_type (decl, mangled, info);
       string_append (decl, "function");
       return mangled;
-    case 'I': /* ident T */
     case 'C': /* class T */
     case 'S': /* struct T */
     case 'E': /* enum T */
diff --git a/libiberty/testsuite/d-demangle-expected b/libiberty/testsuite/d-demangle-expected
index e3f32e31d7b..ffb317f23d4 100644
--- a/libiberty/testsuite/d-demangle-expected
+++ b/libiberty/testsuite/d-demangle-expected
@@ -274,14 +274,6 @@ _D8demangle4testFNhG4dZv
 demangle.test(__vector(double[4]))
 #
 --format=dlang
-_D8demangle4testFI5identZv
-demangle.test(ident)
-#
---format=dlang
-_D8demangle4testFI5ident4testZv
-demangle.test(ident.test)
-#
---format=dlang
 _D8demangle4testFC5classZv
 demangle.test(class)
 #
@@ -314,6 +306,14 @@ _D8demangle4testFT7typedef4testZv
 demangle.test(typedef.test)
 #
 --format=dlang
+_D8demangle4testFIaZv
+demangle.test(in char)
+#
+--format=dlang
+_D8demangle4testFIKaZv
+demangle.test(in ref char)
+#
+--format=dlang
 _D8demangle4testFJaZv
 demangle.test(out char)
 #