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-rw-r--r--include/rtlibc.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/rtlibc.h b/include/rtlibc.h
index d78ec8046f..ac44a97831 100644
--- a/include/rtlibc.h
+++ b/include/rtlibc.h
@@ -20,7 +20,7 @@
#include "libc/libc_fdset.h"
#ifndef RT_USING_LIBC
-#if defined(__CC_ARM) || defined(__CLANG_ARM) || defined(__IAR_SYSTEMS_ICC__)
+#if defined(__ARMCC_VERSION) || defined(__IAR_SYSTEMS_ICC__)
typedef signed long off_t;
typedef int mode_t;
#endif