diff --git a/ext/standard/file.c b/ext/standard/file.c
index 900e29304ea..9bf77ccd854 100644
--- a/ext/standard/file.c
+++ b/ext/standard/file.c
@@ -973,7 +973,8 @@ PHP_FUNCTION(fgetss)
 		RETURN_FALSE;
 	}
 
-	_php3_strip_tags(buf, len, fgetss_state, allow->value.str.val);
+	/* strlen() can be used here since we are doing it on the return of an fgets() anyway */
+	_php3_strip_tags(buf, strlen(buf), fgetss_state, allow?allow->value.str.val:NULL);
 	RETURN_STRING(buf, 0);
 }
 /* }}} */
diff --git a/ext/standard/string.c b/ext/standard/string.c
index 5cff5d43ba3..22bcbc6c3bb 100644
--- a/ext/standard/string.c
+++ b/ext/standard/string.c
@@ -1789,7 +1789,7 @@ PHP_FUNCTION(strip_tags)
 	}
 	convert_to_string(str);
 	buf = estrdup(str->value.str.val);
-	_php3_strip_tags(buf, str->value.str.len, 0, allow->value.str.val);
+	_php3_strip_tags(buf, str->value.str.len, 0, allow?allow->value.str.val:NULL);
 	RETURN_STRING(buf, 0);
 }
 /* }}} */
diff --git a/ext/zlib/zlib.c b/ext/zlib/zlib.c
index 3e505f04256..b4717e40ffd 100644
--- a/ext/zlib/zlib.c
+++ b/ext/zlib/zlib.c
@@ -518,7 +518,8 @@ PHP_FUNCTION(gzgetss)
 		RETURN_FALSE;
 	}
 
-	_php3_strip_tags(buf, len, ZLIBG(gzgetss_state), allow->value.str.val);
+	/* strlen() can be used here since we are doing it on the return of an fgets() anyway */
+	_php3_strip_tags(buf, strlen, ZLIBG(gzgetss_state), allow?allow->value.str.val:NULL);
 	RETURN_STRING(buf, 0);
 	
 }