diff --git a/source/meta.tex b/source/meta.tex
index ec0284a97c..6f545ac92c 100644
--- a/source/meta.tex
+++ b/source/meta.tex
@@ -6066,7 +6066,7 @@
 
 static_assert(!can_substitute(^^fn1, {^^int}));         // OK
 constexpr info r1 = substitute(^^fn1, {^^int});         // error: \tcode{fn<int>} contains an undeduced
-                                                        // placeholder type
+                                                        // placeholder type for its return type
 
 template<class T>
   auto fn2() {