diff --git a/include/nuttx/crypto/blake2s.h b/include/nuttx/crypto/blake2s.h
index b6d1f89ec23..da16981888c 100644
--- a/include/nuttx/crypto/blake2s.h
+++ b/include/nuttx/crypto/blake2s.h
@@ -88,8 +88,8 @@ typedef struct blake2s_param__
 
 #ifdef __GNUC__ > 3
 #define BLAKE2_UNALIGNED 1
-typedef uint32_t uint32_alias_t __attribute__((may_alias)) aligned_data(1);
-typedef uint16_t uint16_alias_t __attribute__((may_alias)) aligned_data(1);
+typedef uint32_t uint32_alias_t __attribute__((may_alias));
+typedef uint16_t uint16_alias_t __attribute__((may_alias));
 #endif
 
 /****************************************************************************