diff --git a/headers/posix/arch/arm/fenv.h b/headers/posix/arch/arm/fenv.h
index d3254e65ff..9047962986 100644
--- a/headers/posix/arch/arm/fenv.h
+++ b/headers/posix/arch/arm/fenv.h
@@ -29,6 +29,7 @@
 #ifndef	_FENV_H_
 #define	_FENV_H_
 
+#include <sys/cdefs.h>
 #include <sys/types.h>
 #include <SupportDefs.h>
 
diff --git a/headers/posix/arch/ppc/fenv.h b/headers/posix/arch/ppc/fenv.h
index f417c4af7c..7458b30b49 100644
--- a/headers/posix/arch/ppc/fenv.h
+++ b/headers/posix/arch/ppc/fenv.h
@@ -29,6 +29,7 @@
 #ifndef	_FENV_H_
 #define	_FENV_H_
 
+#include <sys/cdefs.h>
 #include <sys/types.h>
 #include <SupportDefs.h>