diff --git a/c/src/exec/score/tools/hppa1.1/genoffsets.c b/c/src/exec/score/tools/hppa1.1/genoffsets.c
index 3bec8e954b..578259e83d 100644
--- a/c/src/exec/score/tools/hppa1.1/genoffsets.c
+++ b/c/src/exec/score/tools/hppa1.1/genoffsets.c
@@ -22,7 +22,9 @@
 
 #include <stdio.h>
 
+#if defined(__hpux__) && defined(__hppa__)
 #include <rtems/system.h>
+#endif
 
 void print_information( void );
 
diff --git a/tools/cpu/hppa1.1/genoffsets.c b/tools/cpu/hppa1.1/genoffsets.c
index 3bec8e954b..578259e83d 100644
--- a/tools/cpu/hppa1.1/genoffsets.c
+++ b/tools/cpu/hppa1.1/genoffsets.c
@@ -22,7 +22,9 @@
 
 #include <stdio.h>
 
+#if defined(__hpux__) && defined(__hppa__)
 #include <rtems/system.h>
+#endif
 
 void print_information( void );