diff --git a/Makefile.am b/Makefile.am
index 13ff62a..1370465 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -75,7 +75,7 @@
 
 CLEANFILES= dfn.c dfn?.out pngout.png libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.pc \
 	libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@-config libpng.vers libpng.sym \
-	pngwin.def check.new pnglibconf.* symbols.new pngtest-log.txt \
+	check.new pnglibconf.* symbols.new pngtest-log.txt \
 	$(SCRIPT_CLEANFILES)
 
 MAINTAINERCLEANFILES = Makefile.in aclocal.m4 config.guess config.h.in \
@@ -90,7 +90,7 @@
 	cp libpng-config $@
 
 scripts/sym.out scripts/vers.out: png.h pngconf.h pnglibconf.h
-scripts/symbols.out scripts/pngwin.out: png.h pngconf.h scripts/pnglibconf.h.prebuilt
+scripts/symbols.out: png.h pngconf.h scripts/pnglibconf.h.prebuilt
 
 libpng.sym: scripts/sym.out
 	rm -f $@
@@ -98,9 +98,6 @@
 libpng.vers: scripts/vers.out
 	rm -f $@
 	cp $? $@
-pngwin.def: scripts/pngwin.out
-	rm -f $@
-	cp $? $@
 pnglibconf.h: pnglibconf.out
 	rm -f $@
 	cp $? $@
@@ -140,7 +137,6 @@
 	mv dfn2.out $@
 
 # Symbol checks (.def and .out files should match)
-scripts/pngwin.chk: scripts/checksym.awk scripts/pngwin.def scripts/pngwin.out
 scripts/symbols.chk: scripts/checksym.awk scripts/symbols.def scripts/symbols.out
 .out.chk:
 	rm -f $@ symbols.new
@@ -166,7 +162,7 @@
 test: check-am
 
 # Extra checks
-check: scripts/symbols.chk scripts/pngwin.chk
+check: scripts/symbols.chk
 
 # Don't distribute the generated script files
 dist-hook: