diff --git a/code/3DSHelper.h b/code/3DSHelper.h
index a904abb20..d67a7c14c 100644
--- a/code/3DSHelper.h
+++ b/code/3DSHelper.h
@@ -58,7 +58,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 namespace Assimp    {
 namespace D3DS  {
 
-#include "./../include/assimp/Compiler/pushpack1.h"
+#include <assimp/Compiler/pushpack1.h>
 
 // ---------------------------------------------------------------------------
 /** Discreet3DS class: Helper class for loading 3ds files. Defines chunks
@@ -363,7 +363,7 @@ struct Texture {
     int iUVSrc;
 };
 
-#include "./../include/assimp/Compiler/poppack1.h"
+#include <assimp/Compiler/poppack1.h>
 
 // ---------------------------------------------------------------------------
 /** Helper structure representing a 3ds material */
diff --git a/code/FBXDocumentUtil.h b/code/FBXDocumentUtil.h
index acc8c4a5c..c0435a663 100644
--- a/code/FBXDocumentUtil.h
+++ b/code/FBXDocumentUtil.h
@@ -44,7 +44,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #ifndef INCLUDED_AI_FBX_DOCUMENT_UTIL_H
 #define INCLUDED_AI_FBX_DOCUMENT_UTIL_H
 
-#include "../include/assimp/defs.h"
+#include <assimp/defs.h>
 #include <string>
 #include <memory>
 #include "FBXDocument.h"
diff --git a/code/HMPFileData.h b/code/HMPFileData.h
index a8ad2deb0..962f2f9c7 100644
--- a/code/HMPFileData.h
+++ b/code/HMPFileData.h
@@ -46,7 +46,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 namespace Assimp    {
 namespace HMP   {
 
-#include "./../include/assimp/Compiler/pushpack1.h"
+#include <assimp/Compiler/pushpack1.h>
 #include <stdint.h>
 
 // to make it easier for us, we test the magic word against both "endianesses"
@@ -131,7 +131,7 @@ struct Vertex_HMP7
     int8_t normal_x,normal_y;
 } PACK_STRUCT;
 
-#include "./../include/assimp/Compiler/poppack1.h"
+#include <assimp/Compiler/poppack1.h>
 
 } //! namespace HMP
 } //! namespace Assimp
diff --git a/code/HalfLifeFileData.h b/code/HalfLifeFileData.h
index 930980c80..7c55657d4 100644
--- a/code/HalfLifeFileData.h
+++ b/code/HalfLifeFileData.h
@@ -51,7 +51,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #ifndef AI_MDLFILEHELPER2_H_INC
 #define AI_MDLFILEHELPER2_H_INC
 
-#include "./../include/assimp/Compiler/pushpack1.h"
+#include <assimp/Compiler/pushpack1.h>
 
 namespace Assimp    {
 namespace MDL   {
@@ -141,7 +141,7 @@ struct Header_HL2 {
     int32_t         transitionindex;
 } /* PACK_STRUCT */;
 
-#include "./../include/assimp/Compiler/poppack1.h"
+#include <assimp/Compiler/poppack1.h>
 
 }
 } // end namespaces
diff --git a/code/Importer/IFC/IFCReaderGen_4.cpp b/code/Importer/IFC/IFCReaderGen_4.cpp
index 7a312e691..fdefedb18 100644
--- a/code/Importer/IFC/IFCReaderGen_4.cpp
+++ b/code/Importer/IFC/IFCReaderGen_4.cpp
@@ -43,7 +43,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #ifndef ASSIMP_BUILD_NO_IFC_IMPORTER
 
 #include "AssimpPCH.h"
-#include "IFCReaderGen4.h"
+#include "IFCReaderGen_4.h"
 
 namespace Assimp {
 using namespace IFC;
diff --git a/code/MD3FileData.h b/code/MD3FileData.h
index 3f9741366..910813fc4 100644
--- a/code/MD3FileData.h
+++ b/code/MD3FileData.h
@@ -246,7 +246,7 @@ struct Vertex
     uint16_t  NORMAL;
 } /*PACK_STRUCT*/;
 
-#include "./../include/assimp/Compiler/poppack1.h"
+#include <assimp/Compiler/poppack1.h>
 
 // -------------------------------------------------------------------------------
 /** @brief Unpack a Q3 16 bit vector to its full float3 representation
diff --git a/code/MD4FileData.h b/code/MD4FileData.h
index e515808ac..ed3dc65e7 100644
--- a/code/MD4FileData.h
+++ b/code/MD4FileData.h
@@ -46,9 +46,9 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <vector>
 #include <sstream>
 
-#include "../include/assimp/types.h"
-#include "../include/assimp/mesh.h"
-#include "../include/assimp/anim.h"
+#include <assimp/types.h>
+#include <assimp/mesh.h>
+#include <assimp/anim.h>
 
 #if defined(_MSC_VER) ||  defined(__BORLANDC__) ||  defined (__BCPLUSPLUS__)
 #   pragma pack(push,1)
diff --git a/code/MDLFileData.h b/code/MDLFileData.h
index 1215b2a80..f9be6761b 100644
--- a/code/MDLFileData.h
+++ b/code/MDLFileData.h
@@ -709,7 +709,7 @@ struct GroupFrame
     SimpleFrame *frames;
 } PACK_STRUCT;
 
-#include "./../include/assimp/Compiler/poppack1.h"
+#include <assimp/Compiler/poppack1.h>
 
 // -------------------------------------------------------------------------------------
 /** \struct IntFace_MDL7
diff --git a/code/glTF2Asset.h b/code/glTF2Asset.h
index d1a70ae0a..0def5b74d 100644
--- a/code/glTF2Asset.h
+++ b/code/glTF2Asset.h
@@ -170,7 +170,7 @@ namespace glTF2
 	#include <assimp/pbrmaterial.h>
 
     #ifdef ASSIMP_API
-        #include "./../include/assimp/Compiler/pushpack1.h"
+        #include <assimp/Compiler/pushpack1.h>
     #endif
 
     //! For binary .glb files
@@ -189,7 +189,7 @@ namespace glTF2
     } PACK_STRUCT;
 
     #ifdef ASSIMP_API
-        #include "./../include/assimp/Compiler/poppack1.h"
+        #include <assimp/Compiler/poppack1.h>
     #endif
 
 
diff --git a/code/glTFAsset.h b/code/glTFAsset.h
index bc79f72ec..b04692901 100644
--- a/code/glTFAsset.h
+++ b/code/glTFAsset.h
@@ -170,7 +170,7 @@ namespace glTF
     #define AI_GLB_MAGIC_NUMBER "glTF"
 
     #ifdef ASSIMP_API
-        #include "./../include/assimp/Compiler/pushpack1.h"
+        #include <assimp/Compiler/pushpack1.h>
     #endif
 
     //! For the KHR_binary_glTF extension (binary .glb file)
@@ -185,7 +185,7 @@ namespace glTF
     } PACK_STRUCT;
 
     #ifdef ASSIMP_API
-        #include "./../include/assimp/Compiler/poppack1.h"
+        #include <assimp/Compiler/poppack1.h>
     #endif
 
 
diff --git a/include/assimp/irrXMLWrapper.h b/include/assimp/irrXMLWrapper.h
index 70b20ebd3..296f26a32 100644
--- a/include/assimp/irrXMLWrapper.h
+++ b/include/assimp/irrXMLWrapper.h
@@ -45,7 +45,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // some long includes ....
 #include <irrXML.h>
-#include "./../include/assimp/IOStream.hpp"
+#include "IOStream.hpp"
 #include "BaseImporter.h"
 #include <vector>