diff --git a/include/ucore/utils.h b/include/ucore/utils.h
index cc1b0cf..cc23bef 100644
--- a/include/ucore/utils.h
+++ b/include/ucore/utils.h
@@ -11,15 +11,6 @@
 #define UC_STATIC_ASSERT(expr) \
         enum { assert_static__ = 1/(expr) };
 
-#ifdef DEBUG
-    #define TRACEF(fmt, ...)\
-    do { \
-        fprintf(stdout, "%s:%d (%s)\t" fmt, __FILE__, __LINE__,  __FUNCTION__,  ##__VA_ARGS__);\
-        fflush(stdout);\
-    } while(0)
-#else
-    #define TRACEF(fmt, ...)
-#endif
 
 //MAX of a and b
 #define UC_MAX(a,b) \
@@ -80,6 +71,9 @@ const typeof( ((const type *)0)->member ) *__mptr = (ptr);    \
 #define UC_STRINGIFY(x) UC_STRINGIFY_HLP(x)
 #define UC_STRINGIFY_HLP(x) #x
 
+/** Macro that expands to a string for the current file:line
+ */
+#define UC_SRC_LOCATION __FILE__ ":" UC_STRINGIFY(__LINE__)
 /** 
  * assert() that is not affected by NDEBUG define
  */
@@ -87,19 +81,29 @@ const typeof( ((const type *)0)->member ) *__mptr = (ptr);    \
  do {\
     if (!(expr) ) {\
         fprintf(stderr,\
-        "UC_ASSERT failed '%s' %s:%d\n", UC_STRINGIFY(expr), __FILE__, __LINE__);\
+        "UC_ASSERT failed '%s' %s\n", UC_STRINGIFY(expr), UC_SRC_LOCATION);\
         uc_backtrace_fd(2);\
         abort();\
     }\
 } while (0)
 
+#ifdef DEBUG
+    #define TRACEF(fmt, ...)\
+    do { \
+        fprintf(stdout, "%s (%s)\t" fmt, UC_SRC_LOCATION,  __FUNCTION__,  ##__VA_ARGS__);\
+        fflush(stdout);\
+    } while(0)
+#else
+    #define TRACEF(fmt, ...)
+#endif
+
 /** 
  * Macro for asserting code that should not be reached, 
  * terminates the program if executed
  */
 #define UC_NOT_REACED()\
 do {\
-    fprintf(stderr, "UC_NOT_REACED at %s:%d\n", __FILE__, __LINE__);\
+    fprintf(stderr, "UC_NOT_REACED at %s\n", UC_SRC_LOCATION);\
     uc_backtrace_fd(2);\
     abort();\
 while (0)