diff --git a/win32/libclamunrar.vcxproj b/win32/libclamunrar.vcxproj
index 47dce90a24..89860990fa 100644
--- a/win32/libclamunrar.vcxproj
+++ b/win32/libclamunrar.vcxproj
@@ -161,7 +161,7 @@
       <AdditionalIncludeDirectories>$(SolutionDir);$(SolutionDir)compat;$(SolutionDir)..;$(CLAM_DEPENDENCIES)\$(PlatformName)\include</AdditionalIncludeDirectories>
       <MinimalRebuild>false</MinimalRebuild>
       <ExceptionHandling>Sync</ExceptionHandling>
-      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
       <StructMemberAlignment>4Bytes</StructMemberAlignment>
       <BufferSecurityCheck>true</BufferSecurityCheck>
       <FunctionLevelLinking>true</FunctionLevelLinking>
@@ -203,7 +203,7 @@
       <StringPooling>false</StringPooling>
       <MinimalRebuild>false</MinimalRebuild>
       <ExceptionHandling>Sync</ExceptionHandling>
-      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
       <StructMemberAlignment>4Bytes</StructMemberAlignment>
       <BufferSecurityCheck>true</BufferSecurityCheck>
       <FunctionLevelLinking>true</FunctionLevelLinking>