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-rw-r--r--ext/bigdecimal/depend2
1 files changed, 2 insertions, 0 deletions
diff --git a/ext/bigdecimal/depend b/ext/bigdecimal/depend
index 6783192b30..78833701ef 100644
--- a/ext/bigdecimal/depend
+++ b/ext/bigdecimal/depend
@@ -1,3 +1,5 @@
+extconf.h: $(srcdir)/$(GEMSPEC)
+
# AUTOGENERATED DEPENDENCIES START
bigdecimal.o: $(RUBY_EXTCONF_H)
bigdecimal.o: $(arch_hdrdir)/ruby/config.h