diff --git a/include/msvcrt/crtdbg.h b/include/msvcrt/crtdbg.h
new file mode 100644
index 00000000000..e8e62bcad01
--- /dev/null
+++ b/include/msvcrt/crtdbg.h
@@ -0,0 +1,91 @@
+/*
+ * Debug API
+ *
+ * Copyright 2001 Francois Gouget.
+ */
+#ifndef __WINE_CRTDBG_H_
+#define __WINE_CRTDBG_H_
+
+/* The debug API is not implemented in Winelib.
+ * Redirect everything to the regular APIs.
+ */
+
+
+#define _CRT_WARN                       0
+#define _CRT_ERROR                      1
+#define _CRT_ASSERT                     2
+#define _CRT_ERRCNT                     3
+
+#define _FREE_BLOCK                     0
+#define _NORMAL_BLOCK                   1
+#define _CRT_BLOCK                      2
+#define _IGNORE_BLOCK                   3
+#define _CLIENT_BLOCK                   4
+#define _MAX_BLOCKS                     5
+
+
+typedef struct _CrtMemState
+{
+    struct _CrtMemBlockHeader* pBlockHeader;
+    unsigned long lCounts[_MAX_BLOCKS];
+    unsigned long lSizes[_MAX_BLOCKS];
+    unsigned long lHighWaterCount;
+    unsigned long lTotalCount;
+} _CrtMemState;
+
+
+#ifndef _DEBUG
+
+#define _ASSERT(expr)                   (0)
+#define _ASSERTE(expr)                  (0)
+#define _CrtDbgBreak()                  (0)
+
+#else /* _DEBUG */
+
+#include <assert.h>
+#define _ASSERT(expr)                   assert(expr)
+#define _ASSERTE(expr)                  assert(expr)
+#if defined(__GNUC__) && defined(__i386__)
+#define _CrtDbgBreak()                  __asm__ ("\tint $0x3\n")
+#else
+#define _CrtDbgBreak()                  (0)
+#endif
+
+#endif /* _DEBUG */
+
+#define _CrtCheckMemory()               (1)
+#define _CrtDbgReport(...)              (0)
+#define _CrtDoForAllClientObjects(f,c)  (0)
+#define _CrtDumpMemoryLeaks()           (0)
+#define _CrtIsMemoryBlock(p,s,r,f,l)    (1)
+#define _CrtIsValidHeapPointer(p)       (1)
+#define _CrtIsValidPointer(p,s,a)       (1)
+#define _CrtMemCheckpoint(s)            (0)
+#define _CrtMemDifference(s1,s2,s3)     (0)
+#define _CrtMemDumpAllObjectsSince(s)   (0)
+#define _CrtMemDumpStatistics(s)        (0)
+#define _CrtSetAllocHook(f)             (0)
+#define _CrtSetBreakAlloc(a)            (0)
+#define _CrtSetDbgFlag(f)               (0)
+#define _CrtSetDumpClient(f)            (0)
+#define _CrtSetReportMode(t,m)          (0)
+
+#define _RPT0(t,m)
+#define _RPT1(t,m,p1)
+#define _RPT2(t,m,p1,p2)
+#define _RPT3(t,m,p1,p2,p3)
+#define _RPT4(t,m,p1,p2,p3,p4)
+#define _RPTF0(t,m)
+#define _RPTF1(t,m,p1)
+#define _RPTF2(t,m,p1,p2)
+#define _RPTF3(t,m,p1,p2,p3)
+#define _RPTF4(t,m,p1,p2,p3,p4)
+
+
+#define _malloc_dbg(s,t,f,l)            malloc(s)
+#define _calloc_dbg(c,s,t,f,l)          calloc(c,s)
+#define _expand_dbg(p,s,t,f,l)          _expand(p,s)
+#define _free_dbg(p,t)                  free(p)
+#define _realloc_dbg(p,s,t,f,l)         realloc(p,s)
+
+#endif /* __WINE_CRTDBG_H */