diff --git a/host/lib/usrp/common/max287x.hpp b/host/lib/usrp/common/max287x.hpp
index 839ed77..1fca880 100644
--- a/host/lib/usrp/common/max287x.hpp
+++ b/host/lib/usrp/common/max287x.hpp
@@ -30,6 +30,7 @@
 #include <boost/math/special_functions/round.hpp>
 #include <stdint.h>
 #include <vector>
+#include <string>
 #include "max2870_regs.hpp"
 #include "max2871_regs.hpp"
 
@@ -642,8 +643,8 @@ double max287x<max287x_regs_t>::set_frequency(
         << boost::format("MAX287x: Intermediates: ref=%0.2f, outdiv=%f, fbdiv=%f"
             ) % ref_freq % double(RFdiv*2) % double(N + double(FRAC)/double(MOD)) << std::endl
         << boost::format("MAX287x: tune: R=%d, BS=%d, N=%d, FRAC=%d, MOD=%d, T=%d, D=%d, RFdiv=%d, type=%s"
-            ) % R % BS % N % FRAC % MOD % T % D % RFdiv % ((is_int_n) ? "Integer-N" : "Fractional") << std::endl
-        << boost::format("MAX287x: Frequencies (MHz): REQ=%0.2f, ACT=%0.2f, VCO=%0.2f, PFD=%0.2f, BAND=%0.2f"
+            ) % R % BS % N % FRAC % MOD % T % D % RFdiv % ((is_int_n) ? std::string("Integer-N") : std::string("Fractional"))
+        << std::endl << boost::format("MAX287x: Frequencies (MHz): REQ=%0.2f, ACT=%0.2f, VCO=%0.2f, PFD=%0.2f, BAND=%0.2f"
             ) % (target_freq/1e6) % (actual_freq/1e6) % (vco_freq/1e6) % (pfd_freq/1e6) % (pfd_freq/BS/1e6) << std::endl;
 
     //load the register values