diff --git a/pcbnew/kicad_plugin.cpp b/pcbnew/kicad_plugin.cpp
index 28fd46821e..4fc81e1868 100644
--- a/pcbnew/kicad_plugin.cpp
+++ b/pcbnew/kicad_plugin.cpp
@@ -1303,7 +1303,7 @@ void PCB_IO::format( ZONE_CONTAINER* aZone, int aNestLevel ) const
     // (perhaps netcode and netname should be not stored)
     m_out->Print( aNestLevel, "(zone (net %d) (net_name %s)",
                   aZone->GetIsKeepout() ? 0 : aZone->GetNet(),
-                  m_out->Quotew( aZone->GetIsKeepout() ? "" : aZone->GetNetName() ).c_str() );
+                  m_out->Quotew( aZone->GetIsKeepout() ? wxT("") : aZone->GetNetName() ).c_str() );
 
     formatLayer( aZone );
 
diff --git a/pcbnew/legacy_plugin.cpp b/pcbnew/legacy_plugin.cpp
index d9e8ce5642..ae84e3a988 100644
--- a/pcbnew/legacy_plugin.cpp
+++ b/pcbnew/legacy_plugin.cpp
@@ -3613,7 +3613,7 @@ void LEGACY_PLUGIN::saveZONE_CONTAINER( const ZONE_CONTAINER* me ) const
     fprintf( m_fp,  "ZInfo %lX %d %s\n",
                     me->GetTimeStamp(),
                     me->GetIsKeepout() ? 0 : me->GetNet(),
-                    EscapedUTF8( me->GetIsKeepout() ? "" : me->GetNetName() ).c_str() );
+                    EscapedUTF8( me->GetIsKeepout() ? wxT("") : me->GetNetName() ).c_str() );
 
     // Save the outline layer info
     fprintf( m_fp, "ZLayer %d\n", me->GetLayer() );