diff --git a/regexp/orig/regex.c b/regexp/orig/regex.c
index b8509b70b3be..b429eabbcf13 100644
--- a/regexp/orig/regex.c
+++ b/regexp/orig/regex.c
@@ -302,7 +302,7 @@ init_syntax_once ()
 #   define alloca __builtin_alloca
 #  else /* not __GNUC__ */
 #   if HAVE_ALLOCA_H
-#    include <alloca.h>
+#    include <sal/alloca.h>
 #   endif /* HAVE_ALLOCA_H */
 #  endif /* not __GNUC__ */