diff --git a/examples/Makefile.in b/examples/Makefile.in
index fcc052a..09bae06 100644
--- a/examples/Makefile.in
+++ b/examples/Makefile.in
@@ -67,6 +67,8 @@
 CCDEPMODE = @CCDEPMODE@
 CFLAGS = @CFLAGS@
 CONFIGURE_DEPENDS = @CONFIGURE_DEPENDS@
+CPLUSPLUS_FOUND_FALSE = @CPLUSPLUS_FOUND_FALSE@
+CPLUSPLUS_FOUND_TRUE = @CPLUSPLUS_FOUND_TRUE@
 CPP = @CPP@
 CPPFLAGS = @CPPFLAGS@
 CXX = @CXX@