diff --git a/NEWS b/NEWS
index 8a184a8f3e67..f4fa45b04fc5 100644
--- a/NEWS
+++ b/NEWS
@@ -2,6 +2,11 @@ This documents significant changes in the dev branch of ksh 93u+m.
 For full details, see the git log at: https://github.com/ksh93/ksh
 Uppercase BUG_* IDs are shell bug IDs as used by the Modernish shell library.
 
+2024-01-05:
+
+- Fixed a potential crash on pressing Ctrl+C on the command line while
+  history expansion (the -H or histexpand option) is active.
+
 2023-12-28:
 
 - Fixed intermittent incorrect behaviour (a race condition), introduced on
diff --git a/src/cmd/ksh93/sh/io.c b/src/cmd/ksh93/sh/io.c
index b580871eb362..9f171dc7fa6c 100644
--- a/src/cmd/ksh93/sh/io.c
+++ b/src/cmd/ksh93/sh/io.c
@@ -2014,7 +2014,7 @@ static ssize_t slowread(Sfio_t *iop,void *buff,size_t size,Sfdisc_t *handle)
 			sh_timerdel(timeout);
 		timeout=0;
 #if SHOPT_HISTEXPAND
-		if(rsize && *(char*)buff != '\n' && sh.nextprompt==1 && sh_isoption(SH_HISTEXPAND))
+		if(rsize > 0 && *(char*)buff != '\n' && sh.nextprompt==1 && sh_isoption(SH_HISTEXPAND))
 		{
 			int r;
 			((char*)buff)[rsize] = '\0';