diff --git a/libraries/GCS_MAVLink/GCS_Dummy.cpp b/libraries/GCS_MAVLink/GCS_Dummy.cpp
new file mode 100644
index 0000000000..09360e538c
--- /dev/null
+++ b/libraries/GCS_MAVLink/GCS_Dummy.cpp
@@ -0,0 +1,24 @@
+#include "GCS_Dummy.h"
+#include <stdio.h>
+
+#define FORCE_VERSION_H_INCLUDE
+#include <AP_Common/AP_FWVersionDefine.h>
+#undef FORCE_VERSION_H_INCLUDE
+
+const struct GCS_MAVLINK::stream_entries GCS_MAVLINK::all_stream_entries[] {};
+
+/*
+  send_text implementation for dummy GCS
+ */
+void GCS_Dummy::send_textv(MAV_SEVERITY severity, const char *fmt, va_list arg_list, uint8_t dest_bitmask)
+{
+#if !APM_BUILD_TYPE(APM_BUILD_Replay)
+    hal.console->printf("TOGCS: ");
+    hal.console->vprintf(fmt, arg_list);
+    hal.console->printf("\n");
+#else
+    ::printf("TOGCS: ");
+    ::vprintf(fmt, arg_list);
+    ::printf("\n");
+#endif
+}
diff --git a/libraries/GCS_MAVLink/GCS_Dummy.h b/libraries/GCS_MAVLink/GCS_Dummy.h
index f490017c11..eb956b7d85 100644
--- a/libraries/GCS_MAVLink/GCS_Dummy.h
+++ b/libraries/GCS_MAVLink/GCS_Dummy.h
@@ -8,12 +8,6 @@
 #define FW_PATCH 4
 #define FW_TYPE FIRMWARE_VERSION_TYPE_DEV
 
-#define FORCE_VERSION_H_INCLUDE
-#include <AP_Common/AP_FWVersionDefine.h>
-#undef FORCE_VERSION_H_INCLUDE
-
-const struct GCS_MAVLINK::stream_entries GCS_MAVLINK::all_stream_entries[] {};
-
 /*
  *  GCS backend used for many examples and tools
  */
@@ -83,11 +77,7 @@ private:
         return (GCS_MAVLINK_Dummy *)_chan[ofs];
     };
 
-    void send_textv(MAV_SEVERITY severity, const char *fmt, va_list arg_list, uint8_t dest_bitmask) override {
-        hal.console->printf("TOGCS: ");
-        hal.console->vprintf(fmt, arg_list);
-        hal.console->printf("\n");
-    }
+    void send_textv(MAV_SEVERITY severity, const char *fmt, va_list arg_list, uint8_t dest_bitmask) override;
 
     MAV_TYPE frame_type() const override { return MAV_TYPE_FIXED_WING; }
     uint32_t custom_mode() const override { return 3; } // magic number