diff --git a/target-arm/translate-a64.c b/target-arm/translate-a64.c
index 94b3bf40f6..68c5b23914 100644
--- a/target-arm/translate-a64.c
+++ b/target-arm/translate-a64.c
@@ -2662,11 +2662,12 @@ static void disas_pc_rel_adr(DisasContext *s, uint32_t insn)
 {
     unsigned int page, rd;
     uint64_t base;
-    int64_t offset;
+    uint64_t offset;
 
     page = extract32(insn, 31, 1);
     /* SignExtend(immhi:immlo) -> offset */
-    offset = ((int64_t)sextract32(insn, 5, 19) << 2) | extract32(insn, 29, 2);
+    offset = sextract64(insn, 5, 19);
+    offset = offset << 2 | extract32(insn, 29, 2);
     rd = extract32(insn, 0, 5);
     base = s->pc - 4;