diff --git a/include/r3_str.h b/include/r3_str.h
index 1504486..c670387 100644
--- a/include/r3_str.h
+++ b/include/r3_str.h
@@ -14,8 +14,6 @@ int slug_count(const char * p, int len, char ** errstr);
 
 char * slug_compile(const char * str, int len);
 
-bool contains_slug(const char * str);
-
 char * slug_find_pattern(const char *s1, int *len);
 
 char * slug_find_placeholder(const char *s1, int *len);
diff --git a/src/node.c b/src/node.c
index 2bbbe7c..19262b2 100644
--- a/src/node.c
+++ b/src/node.c
@@ -10,6 +10,7 @@
 
 #include "r3.h"
 #include "r3_str.h"
+#include "slug.h"
 #include "zmalloc.h"
 
 
@@ -629,7 +630,7 @@ bool r3_node_has_slug_edges(const node *n) {
     edge *e;
     for ( int i = 0 ; i < n->edge_len ; i++ ) {
         e = n->edges[i];
-        e->has_slug = contains_slug(e->pattern);
+        e->has_slug = r3_path_contains_slug_char(e->pattern);
         if (e->has_slug)
             found = TRUE;
     }
diff --git a/src/slug.c b/src/slug.c
index 4c71b22..004516a 100644
--- a/src/slug.c
+++ b/src/slug.c
@@ -13,11 +13,6 @@
 #include "slug.h"
 #include "zmalloc.h"
 
-inline static int contains_slug_char(const char * str);
-
-inline static int contains_slug_char(const char * str) {
-    return strchr(str, '{') != NULL ? 1 : 0;
-}
 
 
 r3_slug_t * r3_slug_new(char * path, int path_len) {
@@ -46,7 +41,7 @@ void r3_slug_free(r3_slug_t * s) {
  * Return 0 means Empty
  * Return -1 means Error
  */
-int r3_slug_check(r3_slug_t *s, char **errstr) {
+int r3_slug_check(r3_slug_t *s) {
     // if it's empty
     if (s->begin == NULL && s->len == 0) {
         return 0;
@@ -88,7 +83,7 @@ r3_slug_t * r3_slug_parse(char *needle, int needle_len, char *offset, char **err
     }
 
     // there is no slug
-    if (!contains_slug_char(offset)) {
+    if (!r3_path_contains_slug_char(offset)) {
         return NULL;
     }
 
diff --git a/src/slug.h b/src/slug.h
index 4980b1b..d1328c0 100644
--- a/src/slug.h
+++ b/src/slug.h
@@ -41,7 +41,7 @@ typedef struct {
 
 r3_slug_t * r3_slug_new(char * path, int path_len);
 
-int r3_slug_check(r3_slug_t *s, char **errstr);
+int r3_slug_check(r3_slug_t *s);
 
 r3_slug_t * r3_slug_parse(char *needle, int needle_len, char *offset, char **errstr);
 
@@ -49,4 +49,8 @@ char * r3_slug_to_str(const r3_slug_t *s);
 
 void r3_slug_free(r3_slug_t * s);
 
+inline int r3_path_contains_slug_char(const char * str) {
+    return strchr(str, '{') != NULL ? 1 : 0;
+}
+
 #endif /* !SLUG_H */
diff --git a/src/str.c b/src/str.c
index 5e708c4..a1f4c25 100644
--- a/src/str.c
+++ b/src/str.c
@@ -73,10 +73,6 @@ int slug_count(const char * needle, int len, char **errstr) {
     return cnt;
 }
 
-bool contains_slug(const char * str) {
-    return strchr(str, '{') != NULL ? TRUE : FALSE;
-}
-
 char * inside_slug(const char * needle, int needle_len, char *offset, char **errstr) {
     char * s1 = offset;
     char * s2 = offset;
diff --git a/tests/check_slug.c b/tests/check_slug.c
index 04b49dd..743a53e 100644
--- a/tests/check_slug.c
+++ b/tests/check_slug.c
@@ -45,8 +45,7 @@ END_TEST
 
 START_TEST (test_contains_slug)
 {
-    char * path = "/user/{id}/{name}";
-    ck_assert( contains_slug(path) );
+    ck_assert( r3_path_contains_slug_char("/user/{id}/{name}") );
 }
 END_TEST