diff --git a/code/AssetLib/Assbin/AssbinFileWriter.cpp b/code/AssetLib/Assbin/AssbinFileWriter.cpp
index e9d857a84..782595bc1 100644
--- a/code/AssetLib/Assbin/AssbinFileWriter.cpp
+++ b/code/AssetLib/Assbin/AssbinFileWriter.cpp
@@ -50,11 +50,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/version.h>
 #include <assimp/IOStream.hpp>
 
-#ifdef ASSIMP_BUILD_NO_OWN_ZLIB
-#include <zlib.h>
-#else
-#include "../contrib/zlib/zlib.h"
-#endif
+#include "zlib.h"
 
 #include <ctime>
 
diff --git a/code/AssetLib/Q3BSP/Q3BSPFileImporter.cpp b/code/AssetLib/Q3BSP/Q3BSPFileImporter.cpp
index 924949eeb..b67841ad1 100644
--- a/code/AssetLib/Q3BSP/Q3BSPFileImporter.cpp
+++ b/code/AssetLib/Q3BSP/Q3BSPFileImporter.cpp
@@ -48,11 +48,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include <assimp/DefaultLogger.hpp>
 
-#ifdef ASSIMP_BUILD_NO_OWN_ZLIB
-#include <zlib.h>
-#else
-#include "../contrib/zlib/zlib.h"
-#endif
+#include "zlib.h"
 
 #include <assimp/DefaultIOSystem.h>
 #include <assimp/StringComparison.h>
diff --git a/code/Common/Compression.h b/code/Common/Compression.h
index 13a79af3f..cfedc7409 100644
--- a/code/Common/Compression.h
+++ b/code/Common/Compression.h
@@ -41,11 +41,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #pragma once
 
-#ifdef ASSIMP_BUILD_NO_OWN_ZLIB
-#   include <zlib.h>
-#else
-#   include "../contrib/zlib/zlib.h"
-#endif
+#include "zlib.h"
 
 #include <vector>
 #include <cstddef> // size_t