diff --git a/binutils/testsuite/binutils-all/aarch64/disas-adrp-neg-ofs.d b/binutils/testsuite/binutils-all/aarch64/disas-adrp-neg-ofs.d
new file mode 100644
index 00000000000..9f2e2a5cb89
--- /dev/null
+++ b/binutils/testsuite/binutils-all/aarch64/disas-adrp-neg-ofs.d
@@ -0,0 +1,15 @@
+#name: disas-adrp-neg-ofs
+#source: disas-adrp-neg-ofs.s
+#as: -march=morello+c64
+#ld: --section-start .text=0x400000
+#objdump: -D
+
+.*: +file format .*aarch64.*
+
+
+Disassembly of section .text:
+
+0000000000400000 <_start>:
+  400000:	d503201f 	nop
+	...
+  401004:	f0ffffe0 	adrp	c0, 400000 <_start>
diff --git a/binutils/testsuite/binutils-all/aarch64/disas-adrp-neg-ofs.s b/binutils/testsuite/binutils-all/aarch64/disas-adrp-neg-ofs.s
new file mode 100644
index 00000000000..875a9e21a2e
--- /dev/null
+++ b/binutils/testsuite/binutils-all/aarch64/disas-adrp-neg-ofs.s
@@ -0,0 +1,5 @@
+	.global _start
+_start:
+	nop
+	.zero 4096
+	adrp c0, _start
diff --git a/opcodes/aarch64-dis.c b/opcodes/aarch64-dis.c
index a1778b4d2b4..32a40f0841c 100644
--- a/opcodes/aarch64-dis.c
+++ b/opcodes/aarch64-dis.c
@@ -676,6 +676,7 @@ aarch64_ext_imm (const aarch64_operand *self, aarch64_opnd_info *info,
 		 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
 {
   uint64_t imm;
+  unsigned width_ofs = 1;
 
   imm = extract_all_fields (self, code);
 
@@ -688,10 +689,11 @@ aarch64_ext_imm (const aarch64_operand *self, aarch64_opnd_info *info,
 	return FALSE;
 
       imm &= (1UL << 20) - 1;
+      width_ofs++;
     }
 
   if (operand_need_sign_extension (self))
-    imm = sign_extend (imm, get_operand_fields_width (self) - 1);
+    imm = sign_extend (imm, get_operand_fields_width (self) - width_ofs);
 
   if (operand_need_shift_by_two (self))
     imm <<= 2;