diff --git a/examples/ffi/cffi.lsp b/examples/ffi/cffi.lsp
index e6924d15d..8eb63d71a 100644
--- a/examples/ffi/cffi.lsp
+++ b/examples/ffi/cffi.lsp
@@ -4,11 +4,10 @@ Build and load this module with (compile-file "cffi.lsp" :load t)
 ;;
 ;; This toplevel statement notifies the compiler that we will
 ;; need this shared library at runtime. We do not need this
-;; statement in windows.
+;; statement in windows or macOS.
 ;;
-#-(or ming32 windows)
-(cffi:load-foreign-library #+darwin "/usr/lib/libm.dylib"
-			   #-darwin "/usr/lib/libm.so")
+#-(or ming32 windows darwin)
+(cffi:load-foreign-library "/usr/lib/libm.so")
 ;;
 ;; With this other statement, we import the C function sin(),
 ;; which operates on IEEE doubles.
diff --git a/examples/ffi/uffi.lsp b/examples/ffi/uffi.lsp
index a5d99b232..960a12900 100644
--- a/examples/ffi/uffi.lsp
+++ b/examples/ffi/uffi.lsp
@@ -5,11 +5,10 @@ Load it with (load "uffi.fas")
 ;;
 ;; This toplevel statement notifies the compiler that we will
 ;; need this shared library at runtime. We do not need this
-;; statement in windows.
+;; statement in windows and macOS.
 ;;
-#-windows
-(uffi:load-foreign-library #+darwin "/usr/lib/libm.dylib"
-			   #-darwin "/usr/lib/libm.so")
+#-(or windows darwin)
+(uffi:load-foreign-library "/lib64/libm.so.6") ;; adjust the library path/name as needed
 ;;
 ;; With this other statement, we import the C function sin(),
 ;; which operates on IEEE doubles.
diff --git a/src/doc/manual/extensions/ffi.txi b/src/doc/manual/extensions/ffi.txi
index d10fabcdc..db1e0ae20 100644
--- a/src/doc/manual/extensions/ffi.txi
+++ b/src/doc/manual/extensions/ffi.txi
@@ -212,6 +212,9 @@ that the compiler may include them at link time.
 @item
 Every function you will use has to be declared using
 @coderef{ffi:def-function}.
+@item
+In the cases of headers not used by ECL, a header to include might need
+to be specified using @coderef{ffi:clines}.
 @end itemize
 
 @lisp
@@ -257,11 +260,10 @@ Build and load this module with (compile-file "cffi.lsp" :load t)
 ;;
 ;; This toplevel statement notifies the compiler that we will
 ;; need this shared library at runtime. We do not need this
-;; statement in windows.
+;; statement in windows or macOS.
 ;;
-#-(or ming32 windows)
-(cffi:load-foreign-library #+darwin "/usr/lib/libm.dylib"
-			   #-darwin "/usr/lib/libm.so")
+#-(or ming32 windows darwin)
+(cffi:load-foreign-library "/usr/lib/libm.so")
 ;;
 ;; With this other statement, we import the C function sin(),
 ;; which operates on IEEE doubles.