diff --git a/win32/libclamunrar.vcxproj b/win32/libclamunrar.vcxproj
index 89860990fa..c0771f344c 100644
--- a/win32/libclamunrar.vcxproj
+++ b/win32/libclamunrar.vcxproj
@@ -100,7 +100,7 @@
       <ExceptionHandling>Sync</ExceptionHandling>
       <BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
       <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
-      <StructMemberAlignment>4Bytes</StructMemberAlignment>
+      <StructMemberAlignment>Default</StructMemberAlignment>
       <RuntimeTypeInfo>false</RuntimeTypeInfo>
       <PrecompiledHeader>Use</PrecompiledHeader>
       <PrecompiledHeaderFile>rar.hpp</PrecompiledHeaderFile>
@@ -131,7 +131,7 @@
       <ExceptionHandling>Sync</ExceptionHandling>
       <BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
       <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
-      <StructMemberAlignment>4Bytes</StructMemberAlignment>
+      <StructMemberAlignment>Default</StructMemberAlignment>
       <RuntimeTypeInfo>false</RuntimeTypeInfo>
       <PrecompiledHeader>Use</PrecompiledHeader>
       <PrecompiledHeaderFile>rar.hpp</PrecompiledHeaderFile>
@@ -162,7 +162,7 @@
       <MinimalRebuild>false</MinimalRebuild>
       <ExceptionHandling>Sync</ExceptionHandling>
       <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
-      <StructMemberAlignment>4Bytes</StructMemberAlignment>
+      <StructMemberAlignment>Default</StructMemberAlignment>
       <BufferSecurityCheck>true</BufferSecurityCheck>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <EnableEnhancedInstructionSet>NoExtensions</EnableEnhancedInstructionSet>
@@ -204,7 +204,7 @@
       <MinimalRebuild>false</MinimalRebuild>
       <ExceptionHandling>Sync</ExceptionHandling>
       <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
-      <StructMemberAlignment>4Bytes</StructMemberAlignment>
+      <StructMemberAlignment>Default</StructMemberAlignment>
       <BufferSecurityCheck>true</BufferSecurityCheck>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <RuntimeTypeInfo>false</RuntimeTypeInfo>