diff --git a/src/ac.cpp b/src/ac.cpp
index 961a76a..e208689 100644
--- a/src/ac.cpp
+++ b/src/ac.cpp
@@ -45,7 +45,7 @@
 
 // Acid Cam namespace
 namespace ac {
-    const std::string version="2.3.3";
+    const std::string version="2.3.4";
     // variables
     unsigned int swapColor_r = 0, swapColor_g = 0, swapColor_b = 0;
     bool isNegative = false, noRecord = false, pass2_enabled = false, blendW = false, slide_Show = false, slide_Rand = false, strobe_It = false, switch_Back = false, blur_First = false;
@@ -95,6 +95,7 @@ namespace ac {
     inline void procPos(int &direction, double &pos, double &pos_max, const double max_size = 15);
     std::unordered_map<std::string, int> filter_map;
     bool color_map_set = false;
+    DrawFunction custom_callback = 0;
 }
 
 // globals
@@ -5297,9 +5298,15 @@ void ac::BlendWithSource(cv::Mat &frame) {
     ac::pass2_alpha = 0.50; // set to 50%
     Pass2Blend(frame);// call Pass2 function
 }
+
+void ac::setCustom(DrawFunction f) {
+    custom_callback = f;
+}
+
 // call custom fitler defined elsewhere
 void ac::custom(cv::Mat &frame) {
-    custom_filter(frame);
+    if(custom_callback != 0)
+        custom_callback(frame);
     
 }
 
diff --git a/src/ac.h b/src/ac.h
index d061f29..592530f 100644
--- a/src/ac.h
+++ b/src/ac.h
@@ -118,7 +118,6 @@ namespace ac {
     inline T rol(T x, unsigned int m) {
         return (x << m) | (x >> (sizeof(T)*8 -m));
     }
-    
     // Acid Cam Filter Function prototypes
     void SelfAlphaBlend(cv::Mat &frame);
     void SelfScale(cv::Mat &frame);
@@ -284,6 +283,7 @@ namespace ac {
     void NoFilter(cv::Mat &frame);
     void BlendWithSource(cv::Mat &frame);
     void plugin(cv::Mat &frame);
+    void setCustom(DrawFunction f);
 
     // color maps
     void ApplyColorMap(cv::Mat &frame);
@@ -359,6 +359,5 @@ namespace ac {
 }
 // custom filter function, must be defined in program so it will link
 extern ac::ParticleEmiter emiter;
-extern void custom_filter(cv::Mat &frame);
 
 #endif
diff --git a/src/main_window.cpp b/src/main_window.cpp
index bc720b9..cd4006d 100644
--- a/src/main_window.cpp
+++ b/src/main_window.cpp
@@ -11,6 +11,7 @@
 #include<sys/stat.h>
 
 std::unordered_map<std::string, std::pair<int, int>> filter_map;
+void custom_filter(cv::Mat &);
 
 const char *filter_names[] = { "AC Self AlphaBlend", "Reverse Self AlphaBlend",
     "Opposite Self AlphaBlend", "AC2 Distort", "Reverse Distort", "Opposite Distort",
diff --git a/src/qtheaders.h b/src/qtheaders.h
index 772470e..3fb8110 100644
--- a/src/qtheaders.h
+++ b/src/qtheaders.h
@@ -7,7 +7,7 @@
 #ifndef _QT_HEADERS__
 #define _QT_HEADERS__
 
-#define ac_version "v1.02"
+#define ac_version "v1.03"
 
 #include<QApplication>
 #include<QMainWindow>