diff --git a/TODO b/TODO
index 3a53c6b09..2a642ee96 100644
--- a/TODO
+++ b/TODO
@@ -68,8 +68,6 @@ Enhancements to do:
 ______
 Fix regression test failures:
 
-- There are many regression test failures on NetBSD.
-
 - There are some serious regression test failures on OpenBSD when ksh
   is compiled with AST vmalloc disabled, so the system standard malloc(3)
   is used. These probably represent real ksh93 bugs exposed by OpenBSD's
diff --git a/src/cmd/ksh93/README b/src/cmd/ksh93/README
index c6fa7897c..06831e6a6 100644
--- a/src/cmd/ksh93/README
+++ b/src/cmd/ksh93/README
@@ -254,7 +254,8 @@ failures (crashes, and/or important functionality does not work).
 *	illumos: OmniOS 2020-08-19 (gcc) on x86_64
 	macOS 10.13.6 (High Sierra) on x86_64
 	macOS 10.14.6 (Mojave) on x86_64
-***	NetBSD 8.1 and 9.0 on x86_64
+*	NetBSD 8.1 on x86_64
+*	NetBSD 9.2 on x86_64
 *	OpenBSD 6.8 on x86_64
 **	QNX 6.5.0 on i386
 *	Solaris 11.4 (gcc) on x86_64
diff --git a/src/cmd/ksh93/features/locale b/src/cmd/ksh93/features/locale
index 4155b5307..8221ef7e4 100644
--- a/src/cmd/ksh93/features/locale
+++ b/src/cmd/ksh93/features/locale
@@ -1,7 +1,25 @@
 hdr	locale,wchar,wctype
 lib	locale,localeconv,wctype,iswctype,iswblank
-lib	wctrans,towctrans wctype.h
-typ	wctrans_t wctype.h
+
+tst	note{ do wctrans/towctrans work }end output{
+	/*
+	 * On NetBSD, these functions exist, but simply have no effect for some reason.
+	 * So instead of simple lib/typ tests, this custom test checks if they actually work.
+	 */
+	#include <stdio.h>
+	#include <wchar.h>
+	#include <wctype.h>
+	int main()
+	{
+		wctrans_t toupper = wctrans("toupper"), tolower = wctrans("tolower");
+		int r = towctrans('q',toupper) == 'Q' && towctrans('Q',tolower) == 'q';
+		printf("#define _lib_wctrans\t%d\n",r);
+		printf("#define _lib_towctrans\t%d\n",r);
+		printf("#define _typ_wctrans_t\t%d\n",r);
+		return !r;
+	}
+}end
+
 cat{
 	#if _PACKAGE_ast
 	#   undef  _hdr_locale
diff --git a/src/cmd/ksh93/sh/init.c b/src/cmd/ksh93/sh/init.c
index 5b7dcdcff..1a7f686fe 100644
--- a/src/cmd/ksh93/sh/init.c
+++ b/src/cmd/ksh93/sh/init.c
@@ -76,6 +76,16 @@ static wctrans_t wctrans(const char *name)
 #define towctrans	sh_towctrans
 static int towctrans(int c, wctrans_t t)
 {
+#if _lib_towupper && _lib_towlower
+	if(mbwide())
+	{
+		if(t==1 && iswupper((wint_t)c))
+			c = (int)towlower((wint_t)c);
+		else if(t==2 && iswlower((wint_t)c))
+			c = (int)towupper((wint_t)c);
+	}
+	else
+#endif
 	if(t==1 && isupper(c))
 		c = tolower(c);
 	else if(t==2 && islower(c))