diff --git a/Zend/zend_operators.c b/Zend/zend_operators.c
index 8853d24549fb2..890c19c0ab223 100644
--- a/Zend/zend_operators.c
+++ b/Zend/zend_operators.c
@@ -122,7 +122,7 @@ static _locale_t current_locale = NULL;
 
 #define BLOCKCONV_LOAD(input) \
 	int8x16_t blconv_operand = vld1q_s8((const int8_t*)(input)); \
-	uint8x16_t blconv_mask = vcltq_s8(vaddq_s8(blconv_operand, blconv_offset), blconv_threshold);
+	uint8x16_t blconv_mask = vcltq_s8(vreinterpretq_s8_u8(vaddq_u8(vreinterpretq_u8_s8(blconv_operand), vreinterpretq_u8_s8(blconv_offset))), blconv_threshold);
 
 #define BLOCKCONV_FOUND() vmaxvq_u8(blconv_mask)