Fixed make install (reported by Oliver Lange)
diff --git a/lib/Makefile b/lib/Makefile
index 6bdf2f8..ce66ebb 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -118,8 +118,8 @@
 	@cp -a libzstd.pc $(DESTDIR)$(LIBDIR)/pkgconfig/
 	@install -m 644 libzstd.a $(DESTDIR)$(LIBDIR)/libzstd.a
 	@install -m 644 zstd.h $(DESTDIR)$(INCLUDEDIR)/zstd.h
-	@install -m 644 zstd.h $(DESTDIR)$(INCLUDEDIR)/zbuff.h
-	@install -m 644 zstd.h $(DESTDIR)$(INCLUDEDIR)/zdict.h
+	@install -m 644 zbuff.h $(DESTDIR)$(INCLUDEDIR)/zbuff.h
+	@install -m 644 zdict.h $(DESTDIR)$(INCLUDEDIR)/zdict.h
 	@echo zstd static and shared library installed
 
 uninstall:
@@ -129,8 +129,8 @@
 	@[ -x $(DESTDIR)$(LIBDIR)/libzstd.$(SHARED_EXT_VER) ] && rm -f $(DESTDIR)$(LIBDIR)/libzstd.$(SHARED_EXT_VER)
 	@[ -f $(DESTDIR)$(LIBDIR)/libzstd.a ] && rm -f $(DESTDIR)$(LIBDIR)/libzstd.a
 	@[ -f $(DESTDIR)$(INCLUDEDIR)/zstd.h ] && rm -f $(DESTDIR)$(INCLUDEDIR)/zstd.h
-	@[ -f $(DESTDIR)$(INCLUDEDIR)/zstd.h ] && rm -f $(DESTDIR)$(INCLUDEDIR)/zbuff.h
-	@[ -f $(DESTDIR)$(INCLUDEDIR)/zstd.h ] && rm -f $(DESTDIR)$(INCLUDEDIR)/zdict.h
+	@[ -f $(DESTDIR)$(INCLUDEDIR)/zbuff.h ] && rm -f $(DESTDIR)$(INCLUDEDIR)/zbuff.h
+	@[ -f $(DESTDIR)$(INCLUDEDIR)/zdict.h ] && rm -f $(DESTDIR)$(INCLUDEDIR)/zdict.h
 	@echo zstd libraries successfully uninstalled
 
 endif