diff --git a/Makefile.unix b/Makefile.unix
index a51ae6eab9..bb24978897 100644
--- a/Makefile.unix
+++ b/Makefile.unix
@@ -221,8 +221,8 @@ endif
 # the settings in this float.h are actually correct for your platform!
 
 ifeq ($(CONFIG_ARCH_FLOAT_H),y)
-include/float.h: include/nuttx/float.h
-	$(Q) cp -f include/nuttx/float.h include/float.h
+include/float.h: include/nuttx/lib/float.h
+	$(Q) cp -f include/nuttx/lib/float.h include/float.h
 else
 include/float.h:
 endif
diff --git a/include/nuttx/float.h b/include/nuttx/lib/float.h
similarity index 96%
rename from include/nuttx/float.h
rename to include/nuttx/lib/float.h
index a4d8945ee5..2ff2b4252c 100644
--- a/include/nuttx/float.h
+++ b/include/nuttx/lib/float.h
@@ -1,7 +1,7 @@
 /****************************************************************************
- * include/nuttx/float.h
+ * include/nuttx/lib/float.h
  *
- *   Copyright (C) 2012 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2012, 2016 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Reference: http://pubs.opengroup.org/onlinepubs/009695399/basedefs/float.h.html
@@ -35,8 +35,8 @@
  *
  ****************************************************************************/
 
-#ifndef __INCLUDE_NUTTX_FLOAT_H
-#define __INCLUDE_NUTTX_FLOAT_H
+#ifndef __INCLUDE_NUTTX_LIB_FLOAT_H
+#define __INCLUDE_NUTTX_LIB_FLOAT_H
 
 /* TODO:  These values could vary with architectures toolchains.  This
  * logic should be move at least to the include/arch directory.
@@ -222,4 +222,4 @@
 #  define LDBL_MIN DBL_MIN
 #endif
 
-#endif /* __INCLUDE_NUTTX_FLOAT_H */
+#endif /* __INCLUDE_NUTTX_LIB_FLOAT_H */