diff --git a/src/detect-classtype.c b/src/detect-classtype.c
index 07aa01da6a..1c76120ef1 100644
--- a/src/detect-classtype.c
+++ b/src/detect-classtype.c
@@ -86,11 +86,10 @@ void DetectClasstypeRegister(void)
  *
  * \param Pointer to the string to be parsed.
  *
- * \retval ct_name Pointer to the parsed string on Success; NULL on failure.
+ * \retval bool success or failure.
  */
-static inline const char *DetectClasstypeParseRawString(char *rawstr)
+static int DetectClasstypeParseRawString(char *rawstr, char *out, size_t outsize)
 {
-    const char *ct_name = NULL;
 #define MAX_SUBSTRINGS 30
     int ret = 0;
     int ov[MAX_SUBSTRINGS];
@@ -110,14 +109,15 @@ static inline const char *DetectClasstypeParseRawString(char *rawstr)
         goto end;
     }
 
-    ret = pcre_get_substring((char *)rawstr, ov, 30, 1, &ct_name);
+    ret = pcre_copy_substring((char *)rawstr, ov, 30, 1, out, outsize);
     if (ret < 0) {
-        SCLogError(SC_ERR_PCRE_GET_SUBSTRING, "pcre_get_substring failed");
+        SCLogError(SC_ERR_PCRE_GET_SUBSTRING, "pcre_copy_substring failed");
         goto end;
     }
 
+    return 0;
  end:
-    return ct_name;
+    return -1;
 }
 
 /**
@@ -133,10 +133,10 @@ static inline const char *DetectClasstypeParseRawString(char *rawstr)
  */
 static int DetectClasstypeSetup(DetectEngineCtx *de_ctx, Signature *s, char *rawstr)
 {
-    const char *parsed_ct_name = NULL;
+    char parsed_ct_name[1024] = "";
     SCClassConfClasstype *ct = NULL;
 
-    if ( (parsed_ct_name = DetectClasstypeParseRawString(rawstr)) == NULL) {
+    if (DetectClasstypeParseRawString(rawstr, parsed_ct_name, sizeof(parsed_ct_name)) < -1) {
         SCLogError(SC_ERR_PCRE_PARSE, "Error parsing classtype argument supplied with the "
                    "classtype keyword");
         goto error;
@@ -160,12 +160,9 @@ static int DetectClasstypeSetup(DetectEngineCtx *de_ctx, Signature *s, char *raw
     if (s->prio == -1)
         s->prio = ct->priority;
 
-    pcre_free_substring(parsed_ct_name);
     return 0;
 
  error:
-    if (parsed_ct_name != NULL)
-        pcre_free_substring(parsed_ct_name);
     return -1;
 }