diff --git a/tccpe.c b/tccpe.c
index 2148517d..6f622dd3 100644
--- a/tccpe.c
+++ b/tccpe.c
@@ -292,6 +292,11 @@ typedef struct _IMAGE_BASE_RELOCATION {
 #endif /* ndef IMAGE_NT_SIGNATURE */
 /* ----------------------------------------------------------- */
 
+#ifndef IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
+  /* allow self-host build with tcc 0.97 - doesn't have this in winnt.h */
+  #define IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE 0x0040
+#endif
+
 #pragma pack(push, 1)
 struct pe_header
 {