diff -Naur xml-security-c-1.7.3.orig/xsec/tools/checksig/InteropResolver.cpp xml-security-c-1.7.3/xsec/tools/checksig/InteropResolver.cpp
--- xml-security-c-1.7.3.orig/xsec/tools/checksig/InteropResolver.cpp	2012-07-23 09:56:10.000000000 -0700
+++ xml-security-c-1.7.3/xsec/tools/checksig/InteropResolver.cpp	2017-03-11 19:23:48.540875297 -0800
@@ -645,7 +645,7 @@
 
 	}
 
-	return false;
+	return NULL;
 
 }