diff --git a/include/cln/exception.h b/include/cln/exception.h
index d9f1a4f..37ea17b 100644
--- a/include/cln/exception.h
+++ b/include/cln/exception.h
@@ -3,6 +3,7 @@
 #ifndef _CL_EXCEPTION_H
 #define _CL_EXCEPTION_H
 
+#include <string>
 #include <stdexcept>
 
 namespace cln {
diff --git a/tests/test_I_io.cc b/tests/test_I_io.cc
index 74d2c28..9ee259d 100644
--- a/tests/test_I_io.cc
+++ b/tests/test_I_io.cc
@@ -7,7 +7,7 @@ int test_I_io (int iterations)
 	int error = 0;
 	for (int i = iterations; i > 0; i--) {
 		cl_I a = testrandom_I();
-		int base = iterations % (36-1) + 2;
+		unsigned base = iterations % (36-1) + 2;
 		cl_read_flags rflags = {syntax_integer, lsyntax_standard, base};
 		stringstream buf;
 		print_integer(buf, base, a);