diff --git a/ext/opcache/Optimizer/zend_ssa.c b/ext/opcache/Optimizer/zend_ssa.c
index 537258394fe..80de03b6988 100644
--- a/ext/opcache/Optimizer/zend_ssa.c
+++ b/ext/opcache/Optimizer/zend_ssa.c
@@ -192,7 +192,7 @@ static int find_adjusted_tmp_var(const zend_op_array *op_array, uint32_t build_f
 					return EX_VAR_TO_NUM(op->op1.var);
 				}
 			} else if (op->op2_type == IS_CV && op->op1_type == IS_CONST) {
-				zv = CRT_CONSTANT(op->op2);
+				zv = CRT_CONSTANT(op->op1);
 				if (Z_TYPE_P(zv) == IS_LONG
 				 && Z_LVAL_P(zv) != ZEND_LONG_MIN) {
 					*adjustment = -Z_LVAL_P(zv);