diff --git a/nbase/nbase.h b/nbase/nbase.h
index 9c570257c..f5cd2795a 100644
--- a/nbase/nbase.h
+++ b/nbase/nbase.h
@@ -478,10 +478,6 @@ int alloc_vsprintf(char **strp, const char *fmt, va_list va)
 
 char *escape_windows_command_arg(const char *arg);
 
-/* Trivial function that returns nonzero if all characters in str of
-   length strlength are printable (as defined by isprint()) */
-int stringisprintable(const char *str, int strlength);
-
 /* parse_long is like strtol or atoi, but it allows digits only.
    No whitespace, sign, or radix prefix. */
 long parse_long(const char *s, char **tail);
diff --git a/nbase/nbase_str.c b/nbase/nbase_str.c
index 664c80d58..961da3713 100644
--- a/nbase/nbase_str.c
+++ b/nbase/nbase_str.c
@@ -317,18 +317,6 @@ char *escape_windows_command_arg(const char *arg)
     return ret;
 }
 
-/* Trivial function that returns nonzero if all characters in str of length strlength are
-   printable (as defined by isprint()) */
-int stringisprintable(const char *str, int strlength) {
-  int i;
-
-  for (i = 0; i < strlength; i++)
-    if (!isprint((int)(unsigned char)str[i]))
-      return 0;
-
-  return 1;
-}
-
 /* Convert non-printable characters to replchar in the string */
 void replacenonprintable(char *str, int strlength, char replchar) {
   int i;