diff --git a/Makefile b/Makefile
index 2d08a64..0efc0bd 100644
--- a/Makefile
+++ b/Makefile
@@ -116,7 +116,9 @@ version-header:
 	@echo "#ifndef CHROMA_VERSION_H" > $(INCDIR)/chroma_version.h
 	@echo "#define CHROMA_VERSION_H" >> $(INCDIR)/chroma_version.h
 	@echo "" >> $(INCDIR)/chroma_version.h
+	@echo "#ifndef CHROMA_VERSION" >> $(INCDIR)/chroma_version.h
 	@echo "#define CHROMA_VERSION \"$(VERSION)\"" >> $(INCDIR)/chroma_version.h
+	@echo "#endif" >> $(INCDIR)/chroma_version.h
 	@echo "" >> $(INCDIR)/chroma_version.h
 	@echo "#endif // CHROMA_VERSION_H" >> $(INCDIR)/chroma_version.h