Index: spdrs60/srcpmessage.cpp
--- spdrs60/srcpmessage.cpp.orig
+++ spdrs60/srcpmessage.cpp
@@ -553,9 +553,9 @@ unsigned int GaMessage::getValue() const
  *   INIT <bus> GL <addr> <prot> <protv> <maxsteps> <fcount>
  *    0     1   2    3      4       5         6         7
  */
-GlMessage::GlMessage(Type type = mtGlInit, unsigned int abus = 1,
-        unsigned int addr = 1, Protocol prot = proDCC, unsigned int pv = 1,
-        unsigned int maxvs = 14, unsigned int fc = 1):
+GlMessage::GlMessage(Type type, unsigned int abus,
+        unsigned int addr, Protocol prot, unsigned int pv,
+        unsigned int maxvs, unsigned int fc):
     SrcpMessage(type, abus), address(addr), protocol(prot),
     pversion(pv), maxvsteps(maxvs), fcount(fc), fmap(0)
 {
@@ -566,7 +566,7 @@ GlMessage::GlMessage(Type type = mtGlInit, unsigned in
  *   SET <bus> GL <addr> <drivemode> <currentv> <maxv> <f1> . . <fn>
  *    0    1   2    3         4          5        6      7
  */
-GlMessage::GlMessage(Type type = mtGlInit, unsigned int abus = 1,
+GlMessage::GlMessage(Type type, unsigned int abus = 1,
         unsigned int addr = 1, unsigned int fc = 1, unsigned int dm = 1,
         unsigned int cv = 0, unsigned int mv = 14,
         unsigned int map = 0):
@@ -579,7 +579,7 @@ GlMessage::GlMessage(Type type = mtGlInit, unsigned in
  *   SET <bus> GL <addr> <drivemode> <currentv> <maxv> <f1> . . <fn>
  *    0    1   2    3         4          5        6      7
  */
-GlMessage::GlMessage(Type type = mtGlInit, unsigned int abus = 1,
+GlMessage::GlMessage(Type type, unsigned int abus = 1,
         unsigned int addr = 1, unsigned int dm = 1,
         unsigned int cv = 0, unsigned int mv = 14, bool f0 = false):
     SrcpMessage(type, abus), address(addr), drivemode(dm),
@@ -773,7 +773,7 @@ void GlMessage::setFunctionMap(unsigned int map = 0)
  *   TERM <bus> GL <addr>
  *    0     1   2    3
  */
-GlMessage::GlMessage(Type type = mtGlGet, unsigned int abus = 1,
+GlMessage::GlMessage(Type type, unsigned int abus = 1,
         unsigned int addr = 1):
     SrcpMessage(type, abus), address(addr)
 {