diff --git a/sdk/xtdk/ldrtypes.h b/sdk/xtdk/ldrtypes.h
new file mode 100644
index 0000000..315f450
--- /dev/null
+++ b/sdk/xtdk/ldrtypes.h
@@ -0,0 +1,73 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            sdk/xtdk/ldrtypes.h
+ * DESCRIPTION:     Loader structures definitions
+ * DEVELOPERS:      Rafal Kupiec <belliash@codingworkshop.eu.org>
+ */
+
+#ifndef __XTDK_LDRTYPES_H
+#define __XTDK_LDRTYPES_H
+
+#include "xtcommon.h"
+
+
+/* Loader Data Table Entry Flags */
+#define LDR_DTE_STATIC_LINK                        0x00000002
+#define LDR_DTE_IMAGE_DLL                          0x00000004
+#define LDR_DTE_SHIMENG_SUPPRESSED_ENTRY           0x00000008
+#define LDR_DTE_IMAGE_INTEGRITY_FORCED             0x00000020
+#define LDR_DTE_LOAD_IN_PROGRESS                   0x00001000
+#define LDR_DTE_UNLOAD_IN_PROGRESS                 0x00002000
+#define LDR_DTE_ENTRY_PROCESSED                    0x00004000
+#define LDR_DTE_ENTRY_INSERTED                     0x00008000
+#define LDR_DTE_CURRENT_LOAD                       0x00010000
+#define LDR_DTE_FAILED_BUILTIN_LOAD                0x00020000
+#define LDR_DTE_DONT_CALL_FOR_THREADS              0x00040000
+#define LDR_DTE_PROCESS_ATTACH_CALLED              0x00080000
+#define LDR_DTE_DEBUG_SYMBOLS_LOADED               0x00100000
+#define LDR_DTE_IMAGE_NOT_AT_BASE                  0x00200000
+#define LDR_DTE_COR_IMAGE                          0x00400000
+#define LDR_DTE_COR_OWNS_UNMAP                     0x00800000
+#define LDR_DTE_SYSTEM_MAPPED                      0x01000000
+#define LDR_DTE_IMAGE_VERIFYING                    0x02000000
+#define LDR_DTE_DRIVER_DEPENDENT_DLL               0x04000000
+#define LDR_DTE_ENTRY_NATIVE                       0x08000000
+#define LDR_DTE_REDIRECTED                         0x10000000
+#define LDR_DTE_NON_PAGED_DEBUG_INFO               0x20000000
+#define LDR_DTE_MM_LOADED                          0x40000000
+#define LDR_DTE_COMPAT_DATABASE_PROCESSED          0x80000000
+
+/* Loader data table entry */
+typedef struct _LDR_DATA_TABLE_ENTRY
+{
+    LIST_ENTRY InLoadOrderLinks;
+    LIST_ENTRY InMemoryOrderLinks;
+    LIST_ENTRY InInitializationOrderLinks;
+    PVOID DllBase;
+    PVOID EntryPoint;
+    ULONG SizeOfImage;
+    UNICODE_STRING FullDllName;
+    UNICODE_STRING BaseDllName;
+    ULONG Flags;
+    USHORT LoadCount;
+    USHORT TlsIndex;
+    union
+    {
+        LIST_ENTRY HashLinks;
+        struct
+        {
+            PVOID SectionPointer;
+            ULONG CheckSum;
+        };
+    };
+    union
+    {
+        ULONG TimeDateStamp;
+        PVOID LoadedImports;
+    };
+    PVOID EntryPointActivationContext;
+    PVOID PatchInformation;
+} LDR_DATA_TABLE_ENTRY, *PLDR_DATA_TABLE_ENTRY;
+
+#endif /* __XTDK_LDRTYPES_H */
diff --git a/sdk/xtdk/xtkmapi.h b/sdk/xtdk/xtkmapi.h
index 3551523..d9fc2b4 100644
--- a/sdk/xtdk/xtkmapi.h
+++ b/sdk/xtdk/xtkmapi.h
@@ -26,6 +26,7 @@
 
 /* Low level data types headers */
 #include "rtltypes.h"
+#include "ldrtypes.h"
 #include "hltypes.h"
 
 /* XT routines */
diff --git a/sdk/xtdk/xtstruct.h b/sdk/xtdk/xtstruct.h
index 3099456..a79d9e7 100644
--- a/sdk/xtdk/xtstruct.h
+++ b/sdk/xtdk/xtstruct.h
@@ -145,6 +145,7 @@ typedef struct _EFI_VLAN_DEVICE_PATH EFI_VLAN_DEVICE_PATH, *PEFI_VLAN_DEVICE_PAT
 typedef struct _FIRMWARE_INFORMATION_BLOCK FIRMWARE_INFORMATION_BLOCK, *PFIRMWARE_INFORMATION_BLOCK;
 typedef struct _GUID GUID, *PGUID;
 typedef struct _KERNEL_INITIALIZATION_BLOCK KERNEL_INITIALIZATION_BLOCK, *PKERNEL_INITIALIZATION_BLOCK;
+typedef struct _LDR_DATA_TABLE_ENTRY LDR_DATA_TABLE_ENTRY, *PLDR_DATA_TABLE_ENTRY;
 typedef struct _LIST_ENTRY LIST_ENTRY, *PLIST_ENTRY;
 typedef struct _LIST_ENTRY32 LIST_ENTRY32, *PLIST_ENTRY32;
 typedef struct _LIST_ENTRY64 LIST_ENTRY64, *PLIST_ENTRY64;