diff --git a/src/pcre2_jit_compile.c b/src/pcre2_jit_compile.c
index 7875938..4a6dde9 100644
--- a/src/pcre2_jit_compile.c
+++ b/src/pcre2_jit_compile.c
@@ -3666,7 +3666,7 @@ if (!common->utf)
 #endif
 
 OP2(SLJIT_LSHR, TMP2, 0, TMP1, 0, SLJIT_IMM, UCD_BLOCK_SHIFT);
-OP2(SLJIT_ADD, TMP2, 0, TMP2, 0, TMP2, 0);
+OP2(SLJIT_SHL, TMP2, 0, TMP2, 0, SLJIT_IMM, 1);
 OP1(SLJIT_MOV_U16, TMP2, 0, SLJIT_MEM1(TMP2), (sljit_sw)PRIV(ucd_stage1));
 OP2(SLJIT_AND, TMP1, 0, TMP1, 0, SLJIT_IMM, UCD_BLOCK_MASK);
 OP2(SLJIT_SHL, TMP2, 0, TMP2, 0, SLJIT_IMM, UCD_BLOCK_SHIFT);
@@ -6628,7 +6628,7 @@ if (needstype || needsscript)
 #endif
 
   OP2(SLJIT_LSHR, TMP2, 0, TMP1, 0, SLJIT_IMM, UCD_BLOCK_SHIFT);
-  OP2(SLJIT_ADD, TMP2, 0, TMP2, 0, TMP2, 0);
+  OP2(SLJIT_SHL, TMP2, 0, TMP2, 0, SLJIT_IMM, 1);
   OP1(SLJIT_MOV_U16, TMP2, 0, SLJIT_MEM1(TMP2), (sljit_sw)PRIV(ucd_stage1));
   OP2(SLJIT_AND, TMP1, 0, TMP1, 0, SLJIT_IMM, UCD_BLOCK_MASK);
   OP2(SLJIT_SHL, TMP2, 0, TMP2, 0, SLJIT_IMM, UCD_BLOCK_SHIFT);