diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 288bc648e..9b8d20ff0 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,8 @@
+2002-07-25  Egor Duda  <deo@logos-m.ru>
+
+	* Makefile.in: Check if API version is updated when exports are 
+	changed and stop if not so.
+
 2002-07-24  Egor Duda  <deo@logos-m.ru>
 
 	* include/cygwin/version.h: Bump minor API version.
diff --git a/winsup/cygwin/Makefile.in b/winsup/cygwin/Makefile.in
index b3fd42058..826f417af 100644
--- a/winsup/cygwin/Makefile.in
+++ b/winsup/cygwin/Makefile.in
@@ -144,6 +144,8 @@ NEW_FUNCTIONS:=regcomp posix_regcomp \
 	       regexec posix_regexec \
 	       regfree posix_regfree
 
+API_VER:=$(srcdir)/include/cygwin/version.h
+
 PWD:=${shell pwd}
 SUBLIBS:=libpthread.a $(PWD)/libm.a libc.a
 EXTRALIBS:=libautomode.a libbinmode.a libtextmode.a
@@ -247,7 +249,7 @@ maintainer-clean realclean: clean
 
 
 # Rule to build cygwin.dll
-new-$(DLL_NAME): $(LDSCRIPT) $(DLL_OFILES) $(DEF_FILE) $(DLL_IMPORTS) $(LIBC) $(LIBM) Makefile winver_stamp
+new-$(DLL_NAME): $(LDSCRIPT) $(DLL_OFILES) $(DEF_FILE) $(DLL_IMPORTS) $(LIBC) $(LIBM) $(API_VER) Makefile winver_stamp
 	$(CXX) $(CXXFLAGS) -nostdlib -Wl,-T$(firstword $^) -Wl,--out-implib,cygdll.a -shared -o $@ \
 	-e $(DLL_ENTRY) $(DEF_FILE) $(DLL_OFILES) version.o winver.o \
 	$(DLL_IMPORTS) $(MALLOC_OBJ) $(LIBM) $(LIBC) \
@@ -272,6 +274,10 @@ dll_ofiles: $(DLL_OFILES)
 $(LIBGMON_A): $(GMON_OFILES) $(GMON_START)
 	$(AR) rcv $(LIBGMON_A) $(GMON_OFILES)
 
+$(API_VER): $(srcdir)/cygwin.din
+	@echo Error: Version info is older than DLL API!
+	@false
+
 version.cc winver.o: winver_stamp
 	@ :