diff --git a/c/src/exec/score/cpu/unix/cpu.c b/c/src/exec/score/cpu/unix/cpu.c
index 524067703d..0e51ce3dae 100644
--- a/c/src/exec/score/cpu/unix/cpu.c
+++ b/c/src/exec/score/cpu/unix/cpu.c
@@ -21,7 +21,6 @@
 
 #include <stdio.h>
 #include <stdlib.h>
-#include <unistd.h>
 #include <signal.h>
 #include <time.h>
 #include <sys/time.h>
diff --git a/c/src/exec/score/cpu/unix/cpu.h b/c/src/exec/score/cpu/unix/cpu.h
index b3e2c927e7..f67a64cb6b 100644
--- a/c/src/exec/score/cpu/unix/cpu.h
+++ b/c/src/exec/score/cpu/unix/cpu.h
@@ -58,6 +58,19 @@ extern "C" {
 
 #endif
 
+#if 0
+static inline X() 
+{
+#ifdef _POSIX_C_SOURCE
+  printf( "_POSIX_C_SOURCE", _POSIX_C_SOURCE );
+#endif
+#ifdef __STRICT_ANSI__
+  printf( "__STRICT_ANSI__", __STRICT_ANSI__ );
+#endif
+}
+#endif
+
+#include <unistd.h>
 #include <setjmp.h>
 #include <signal.h>
 
diff --git a/cpukit/score/cpu/unix/cpu.c b/cpukit/score/cpu/unix/cpu.c
index 524067703d..0e51ce3dae 100644
--- a/cpukit/score/cpu/unix/cpu.c
+++ b/cpukit/score/cpu/unix/cpu.c
@@ -21,7 +21,6 @@
 
 #include <stdio.h>
 #include <stdlib.h>
-#include <unistd.h>
 #include <signal.h>
 #include <time.h>
 #include <sys/time.h>