diff --git a/BasiliskII/src/Unix/configure.ac b/BasiliskII/src/Unix/configure.ac
index 8a34ac9c..09d7ae3b 100644
--- a/BasiliskII/src/Unix/configure.ac
+++ b/BasiliskII/src/Unix/configure.ac
@@ -224,11 +224,11 @@ dnl We use mon if possible.
 MONSRCS=
 if [[ "x$WANT_MON" = "xyes" ]]; then
   AC_MSG_CHECKING(for mon)
-  mon_srcdir=../../../mon/src
+  mon_srcdir=../../../cxmon/src
   if grep mon_init $mon_srcdir/mon.h >/dev/null 2>/dev/null; then
     AC_MSG_RESULT(yes)
     AC_DEFINE(ENABLE_MON, 1, [Define if using "mon".])
-    MONSRCS="$mon_srcdir/mon.cpp $mon_srcdir/mon_6502.cpp $mon_srcdir/mon_z80.cpp $mon_srcdir/mon_cmd.cpp $mon_srcdir/mon_disass.cpp $mon_srcdir/mon_ppc.cpp $mon_srcdir/mon_lowmem.cpp $mon_srcdir/disass/floatformat.c $mon_srcdir/disass/i386-dis.c $mon_srcdir/disass/m68k-dis.c $mon_srcdir/disass/m68k-opc.c $mon_srcdir/disass/mips-dis.c $mon_srcdir/disass/mips-opc.c $mon_srcdir/disass/mips16-opc.c"
+    MONSRCS="$mon_srcdir/mon.cpp $mon_srcdir/mon_6502.cpp $mon_srcdir/mon_z80.cpp $mon_srcdir/mon_cmd.cpp $mon_srcdir/mon_disass.cpp $mon_srcdir/mon_ppc.cpp $mon_srcdir/mon_lowmem.cpp $mon_srcdir/disass/floatformat.c $mon_srcdir/disass/i386-dis.c $mon_srcdir/disass/m68k-dis.c $mon_srcdir/disass/m68k-opc.c"
     CXXFLAGS="$CXXFLAGS -I$mon_srcdir -I$mon_srcdir/disass"
     AC_CHECK_LIB(ncurses, tgetent, ,
       [AC_CHECK_LIB(termcap, tgetent, ,
diff --git a/BasiliskII/src/Unix/main_unix.cpp b/BasiliskII/src/Unix/main_unix.cpp
index 3505335e..c1128b0d 100644
--- a/BasiliskII/src/Unix/main_unix.cpp
+++ b/BasiliskII/src/Unix/main_unix.cpp
@@ -291,7 +291,7 @@ static void sigsegv_dump_state(sigsegv_info_t *sip)
 #endif
 	VideoQuitFullScreen();
 #ifdef ENABLE_MON
-	const char *arg[4] = {"mon", "-m", "-r", NULL};
+	char *arg[4] = {"mon", "-m", "-r", NULL};
 	mon(3, arg);
 #endif
 	QuitEmulator();
@@ -948,7 +948,7 @@ static void sigint_handler(...)
 	m68k_dumpstate(&nextpc);
 #endif
 	VideoQuitFullScreen();
-	const char *arg[4] = {"mon", "-m", "-r", NULL};
+	char *arg[4] = {"mon", "-m", "-r", NULL};
 	mon(3, arg);
 	QuitEmulator();
 }
diff --git a/BasiliskII/src/emul_op.cpp b/BasiliskII/src/emul_op.cpp
index 0f2b59fc..f6b91dde 100644
--- a/BasiliskII/src/emul_op.cpp
+++ b/BasiliskII/src/emul_op.cpp
@@ -70,7 +70,7 @@ void EmulOp(uint16 opcode, M68kRegisters *r)
 				   r->sr);
 			VideoQuitFullScreen();
 #ifdef ENABLE_MON
-			const char *arg[4] = {"mon", "-m", "-r", NULL};
+			char *arg[4] = {"mon", "-m", "-r", NULL};
 			mon(3, arg);
 #endif
 			QuitEmulator();
@@ -575,7 +575,7 @@ void EmulOp(uint16 opcode, M68kRegisters *r)
 				   r->a[0], r->a[1], r->a[2], r->a[3], r->a[4], r->a[5], r->a[6], r->a[7],
 				   r->sr);
 #ifdef ENABLE_MON
-			const char *arg[4] = {"mon", "-m", "-r", NULL};
+			char *arg[4] = {"mon", "-m", "-r", NULL};
 			mon(3, arg);
 #endif
 			QuitEmulator();