1 files changed, 2 insertions, 1 deletions
diff --git a/common.mk b/common.mk
index 77e8cdb99f..d05592325d 100644
--- a/common.mk
+++ b/common.mk
@@ -240,7 +240,8 @@ inits.$(OBJEXT): {$(VPATH)}inits.c {$(VPATH)}ruby.h config.h \
   {$(VPATH)}defines.h {$(VPATH)}intern.h {$(VPATH)}missing.h
 io.$(OBJEXT): {$(VPATH)}io.c {$(VPATH)}ruby.h config.h \
   {$(VPATH)}defines.h {$(VPATH)}intern.h {$(VPATH)}missing.h \
-  {$(VPATH)}rubyio.h {$(VPATH)}rubysig.h  {$(VPATH)}util.h
+  {$(VPATH)}rubyio.h {$(VPATH)}rubysig.h  {$(VPATH)}util.h \
+  {$(VPATH)}env.h
 main.$(OBJEXT): {$(VPATH)}main.c {$(VPATH)}ruby.h config.h \
   {$(VPATH)}defines.h {$(VPATH)}intern.h {$(VPATH)}missing.h
 marshal.$(OBJEXT): {$(VPATH)}marshal.c {$(VPATH)}ruby.h config.h \