diff --git a/include/capstone/capstone.h b/include/capstone/capstone.h
index 30dc5742f3..204a092bf5 100644
--- a/include/capstone/capstone.h
+++ b/include/capstone/capstone.h
@@ -121,7 +121,7 @@ typedef enum cs_mode {
 	CS_MODE_M68K_030 = 1 << 4, ///< M68K 68030 mode
 	CS_MODE_M68K_040 = 1 << 5, ///< M68K 68040 mode
 	CS_MODE_M68K_060 = 1 << 6, ///< M68K 68060 mode
-	CS_MODE_BIG_ENDIAN = 1 << 31,	///< big-endian mode
+	CS_MODE_BIG_ENDIAN = 1U << 31,	///< big-endian mode
 	CS_MODE_MIPS32 = CS_MODE_32,	///< Mips32 ISA (Mips)
 	CS_MODE_MIPS64 = CS_MODE_64,	///< Mips64 ISA (Mips)
 	CS_MODE_M680X_6301 = 1 << 1, ///< M680X Hitachi 6301,6303 mode