diff --git a/llvm/docs/LangRef.rst b/llvm/docs/LangRef.rst
--- a/llvm/docs/LangRef.rst
+++ b/llvm/docs/LangRef.rst
@@ -23466,7 +23466,9 @@
 constrained intrinsics to function correctly.
 
 All function *calls* done in a function that uses constrained floating
-point intrinsics must have the ``strictfp`` attribute.
+point intrinsics must have the ``strictfp`` attribute either on the
+calling instruction or on the declaration or definition of the function
+being called.
 
 All function *definitions* that use constrained floating point intrinsics
 must have the ``strictfp`` attribute.