diff --git a/lld/COFF/Chunks.h b/lld/COFF/Chunks.h
--- a/lld/COFF/Chunks.h
+++ b/lld/COFF/Chunks.h
@@ -486,7 +486,9 @@
 
 class ImportThunkChunkARM : public ImportThunkChunk {
 public:
-  explicit ImportThunkChunkARM(Defined *s) : ImportThunkChunk(s) {}
+  explicit ImportThunkChunkARM(Defined *s) : ImportThunkChunk(s) {
+    setAlignment(2);
+  }
   size_t getSize() const override { return sizeof(importThunkARM); }
   void getBaserels(std::vector<Baserel> *res) override;
   void writeTo(uint8_t *buf) const override;
@@ -494,14 +496,16 @@
 
 class ImportThunkChunkARM64 : public ImportThunkChunk {
 public:
-  explicit ImportThunkChunkARM64(Defined *s) : ImportThunkChunk(s) {}
+  explicit ImportThunkChunkARM64(Defined *s) : ImportThunkChunk(s) {
+    setAlignment(4);
+  }
   size_t getSize() const override { return sizeof(importThunkARM64); }
   void writeTo(uint8_t *buf) const override;
 };
 
 class RangeExtensionThunkARM : public NonSectionChunk {
 public:
-  explicit RangeExtensionThunkARM(Defined *t) : target(t) {}
+  explicit RangeExtensionThunkARM(Defined *t) : target(t) { setAlignment(2); }
   size_t getSize() const override;
   void writeTo(uint8_t *buf) const override;
 
diff --git a/lld/COFF/DLL.cpp b/lld/COFF/DLL.cpp
--- a/lld/COFF/DLL.cpp
+++ b/lld/COFF/DLL.cpp
@@ -365,7 +365,9 @@
 
 class ThunkChunkARM : public NonSectionChunk {
 public:
-  ThunkChunkARM(Defined *i, Chunk *tm) : imp(i), tailMerge(tm) {}
+  ThunkChunkARM(Defined *i, Chunk *tm) : imp(i), tailMerge(tm) {
+    setAlignment(2);
+  }
 
   size_t getSize() const override { return sizeof(thunkARM); }
 
@@ -385,7 +387,9 @@
 
 class TailMergeChunkARM : public NonSectionChunk {
 public:
-  TailMergeChunkARM(Chunk *d, Defined *h) : desc(d), helper(h) {}
+  TailMergeChunkARM(Chunk *d, Defined *h) : desc(d), helper(h) {
+    setAlignment(2);
+  }
 
   size_t getSize() const override { return sizeof(tailMergeARM); }
 
@@ -405,7 +409,9 @@
 
 class ThunkChunkARM64 : public NonSectionChunk {
 public:
-  ThunkChunkARM64(Defined *i, Chunk *tm) : imp(i), tailMerge(tm) {}
+  ThunkChunkARM64(Defined *i, Chunk *tm) : imp(i), tailMerge(tm) {
+    setAlignment(4);
+  }
 
   size_t getSize() const override { return sizeof(thunkARM64); }
 
@@ -422,7 +428,9 @@
 
 class TailMergeChunkARM64 : public NonSectionChunk {
 public:
-  TailMergeChunkARM64(Chunk *d, Defined *h) : desc(d), helper(h) {}
+  TailMergeChunkARM64(Chunk *d, Defined *h) : desc(d), helper(h) {
+    setAlignment(4);
+  }
 
   size_t getSize() const override { return sizeof(tailMergeARM64); }
 
diff --git a/lld/test/COFF/arm64-import2.test b/lld/test/COFF/arm64-import2.test
--- a/lld/test/COFF/arm64-import2.test
+++ b/lld/test/COFF/arm64-import2.test
@@ -11,18 +11,20 @@
 # BEFORE:        0:       00 00 00 94     bl      0x0
 # BEFORE:        4:       00 00 00 94     bl      0x4
 # BEFORE:        8:       c0 03 5f d6     ret
+# BEFORE:        c:       ff              <unknown>
 
 # AFTER: Disassembly of section .text:
 # AFTER-EMPTY:
-# AFTER:  140001000:      03 00 00 94     bl      0x14000100c
-# AFTER:  140001004:      05 00 00 94     bl      0x140001018
+# AFTER:  140001000:      04 00 00 94     bl      0x140001010
+# AFTER:  140001004:      06 00 00 94     bl      0x14000101c
 # AFTER:  140001008:      c0 03 5f d6     ret
-# AFTER:  14000100c:      10 00 00 b0     adrp    x16, #4096
-# AFTER:  140001010:      10 32 40 f9     ldr     x16, [x16, #96]
-# AFTER:  140001014:      00 02 1f d6     br      x16
-# AFTER:  140001018:      10 00 00 b0     adrp    x16, #4096
-# AFTER:  14000101c:      10 3a 40 f9     ldr     x16, [x16, #112]
-# AFTER:  140001020:      00 02 1f d6     br      x16
+# AFTER:  14000100c:      ff cc cc cc     <unknown>
+# AFTER:  140001010:      10 00 00 b0     adrp    x16, #4096
+# AFTER:  140001014:      10 32 40 f9     ldr     x16, [x16, #96]
+# AFTER:  140001018:      00 02 1f d6     br      x16
+# AFTER:  14000101c:      10 00 00 b0     adrp    x16, #4096
+# AFTER:  140001020:      10 3a 40 f9     ldr     x16, [x16, #112]
+# AFTER:  140001024:      00 02 1f d6     br      x16
 
 # IMPORTS: Import {
 # IMPORTS:   Name: library.dll
@@ -45,7 +47,7 @@
   - Name:            .text
     Characteristics: [ IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ ]
     Alignment:       4
-    SectionData:     0000009400000094C0035FD6
+    SectionData:     0000009400000094C0035FD6FF
     Relocations:
       - VirtualAddress:  0
         SymbolName:      function