diff --git a/arch/SH/SHDisassembler.c b/arch/SH/SHDisassembler.c
index 9986b32..fbecaa5 100644
--- a/arch/SH/SHDisassembler.c
+++ b/arch/SH/SHDisassembler.c
@@ -17,7 +17,12 @@
 	if (_detail)							\
 		_detail->regs_write[_detail->regs_write_count++] = _reg
 
-enum direction {read, write};
+/* read and write collide with the unistd.h prototypes when a libc header
+ * set is preincluded in freestanding builds (like the radare2 uefi port),
+ * so give the enum values their own names and keep the short spelling */
+enum direction {sh_dir_read, sh_dir_write};
+#define read sh_dir_read
+#define write sh_dir_write
 
 static void regs_rw(cs_detail *detail, enum direction rw, sh_reg reg)
 {