diff --git a/README.md b/README.md
index c8964319d..061282677 100644
--- a/README.md
+++ b/README.md
@@ -112,7 +112,7 @@ contains these and may be used by all packages.
 
 dlopen() and RTLD_* flags
 =================================
-<dlfn.h> declares
+<dlfcn.h> declares
 
     enum { RTLD_NOW=0, RTLD_LAZY=1, RTLD_LOCAL=0, RTLD_GLOBAL=2,       RTLD_NOLOAD=4}; // 32-bit
     enum { RTLD_NOW=2, RTLD_LAZY=1, RTLD_LOCAL=0, RTLD_GLOBAL=0x00100, RTLD_NOLOAD=4}; // 64-bit