diff --git a/busybox.def.h b/busybox.def.h
index 63b8306f3..c85f1eeab 100644
--- a/busybox.def.h
+++ b/busybox.def.h
@@ -139,12 +139,6 @@
 // at the same time...
 #define BB_FEATURE_USE_PROCFS
 //
-// Enable full regular expressions.  This adds about 
-// 4k.  When this is off, things that would normally
-// use regualr expressions (like grep) will just use
-// normal strings.
-#define BB_FEATURE_FULL_REGULAR_EXPRESSIONS
-//
 // This compiles out everything but the most 
 // trivial --help usage information (i.e. reduces binary size)
 //#define BB_FEATURE_TRIVIAL_HELP
@@ -281,10 +275,6 @@
 #define BB_MTAB
 #endif
 //
-#if defined BB_FEATURE_FULL_REGULAR_EXPRESSIONS && (defined BB_SED || defined BB_GREP )
-#define BB_REGEXP
-#endif
-//
 #if defined BB_FEATURE_SH_COMMAND_EDITING && defined BB_SH
 #define BB_CMDEDIT
 #endif
diff --git a/utility.c b/utility.c
index aa8bef6b3..911d84eaf 100644
--- a/utility.c
+++ b/utility.c
@@ -1033,82 +1033,6 @@ int get_console_fd(char *tty_name)
 #endif							/* BB_CHVT || BB_DEALLOCVT || BB_SETKEYCODES */
 
 
-#if !defined BB_REGEXP && (defined BB_GREP || defined BB_SED)
-
-/* Do a case insensitive strstr() */
-char *stristr(char *haystack, const char *needle)
-{
-	int len = strlen(needle);
-
-	while (*haystack) {
-		if (!strncasecmp(haystack, needle, len))
-			break;
-		haystack++;
-	}
-
-	if (!(*haystack))
-		haystack = NULL;
-
-	return haystack;
-}
-
-/* This tries to find a needle in a haystack, but does so by
- * only trying to match literal strings (look 'ma, no regexps!)
- * This is short, sweet, and carries _very_ little baggage,
- * unlike its beefier cousin in regexp.c
- *  -Erik Andersen
- */
-extern int find_match(char *haystack, char *needle, int ignoreCase)
-{
-
-	if (ignoreCase == FALSE)
-		haystack = strstr(haystack, needle);
-	else
-		haystack = stristr(haystack, needle);
-	if (haystack == NULL)
-		return FALSE;
-	return TRUE;
-}
-
-
-/* This performs substitutions after a string match has been found.  */
-extern int replace_match(char *haystack, char *needle, char *newNeedle,
-						 int ignoreCase)
-{
-	int foundOne = 0;
-	char *where, *slider, *slider1, *oldhayStack;
-
-	if (ignoreCase == FALSE)
-		where = strstr(haystack, needle);
-	else
-		where = stristr(haystack, needle);
-
-	if (strcmp(needle, newNeedle) == 0)
-		return FALSE;
-
-	oldhayStack = (char *) xmalloc((unsigned) (strlen(haystack)));
-	while (where != NULL) {
-		foundOne++;
-		strcpy(oldhayStack, haystack);
-		for (slider = haystack, slider1 = oldhayStack; slider != where;
-			 slider++, slider1++);
-		*slider = 0;
-		haystack = strcat(haystack, newNeedle);
-		slider1 += strlen(needle);
-		haystack = strcat(haystack, slider1);
-		where = strstr(slider, needle);
-	}
-	free(oldhayStack);
-
-	if (foundOne > 0)
-		return TRUE;
-	else
-		return FALSE;
-}
-
-#endif							/* ! BB_REGEXP && (BB_GREP || BB_SED) */
-
-
 #if defined BB_FIND || defined BB_INSMOD
 /*
  * Routine to see if a text string is matched by a wildcard pattern.