diff --git a/src/Makevars.in b/src/Makevars.in
index 3e55470..656eae4 100644
--- a/src/Makevars.in
+++ b/src/Makevars.in
@@ -15,7 +15,7 @@ export PKG_CXXPICFLAGS=@CXXPICFLAGS@
 export RANLIB=@RANLIB@
 export MAKE=@MAKE@
 export AR=@AR@
-export PKG_CPPFLAGS=@CPPFLAGS@ -I"@RHDF5_INCLUDE@"
+export PKG_CPPFLAGS=@CPPFLAGS@
 export PKG_LDFLAGS=@LDFLAGS@
 
 all: copying $(SHLIB)