diff --git a/build-aux/m4/buildsys.m4 b/build-aux/m4/buildsys.m4
index aa9576a..9064707 100644
--- a/build-aux/m4/buildsys.m4
+++ b/build-aux/m4/buildsys.m4
@@ -49,7 +49,18 @@ AC_DEFUN([BUILDSYS_INIT], [
 		AC_SUBST(AMIGA_LIB_CFLAGS)
 		AC_SUBST(AMIGA_LIB_LDFLAGS)
 
-		AC_PATH_PROG(TPUT, tput)
+		case "$build_os" in
+			morphos*)
+				dnl Don't use tput on MorphOS: The colored
+				dnl output is quite unreadable and in some
+				dnl MorphOS versions, the output from tput is
+				dnl not 8-bit safe, with awk (for AC_SUBST)
+				dnl failing as a result.
+				;;
+			*)
+				AC_PATH_PROG(TPUT, tput)
+				;;
+		esac
 
 		AS_IF([test x"$TPUT" != x""], [
 			if x=$($TPUT el 2>/dev/null); then