diff --git a/aegisub/src/ass_dialogue.cpp b/aegisub/src/ass_dialogue.cpp
index df22c786c..8cc5fd9f5 100644
--- a/aegisub/src/ass_dialogue.cpp
+++ b/aegisub/src/ass_dialogue.cpp
@@ -774,14 +774,7 @@ wxString AssDialogue::GetMarginString(int which,bool pad) {
 
 
 
-/// @brief Process parameters via callback 
-/// @param tagName   
-/// @param par_n     
-/// @param param     
-/// @param userData) 
-/// @param userData  
-///
-void AssDialogue::ProcessParameters(void (*callback)(wxString tagName,int par_n,AssOverrideParameter *param,void *userData),void *userData) {
+void AssDialogue::ProcessParameters(AssDialogueBlockOverride::ProcessParametersCallback callback,void *userData) {
 	// Apply for all override blocks
 	AssDialogueBlockOverride *curBlock;
 	//ParseASSTags();
diff --git a/aegisub/src/ass_dialogue.h b/aegisub/src/ass_dialogue.h
index 4f0c6168a..9595c2635 100644
--- a/aegisub/src/ass_dialogue.h
+++ b/aegisub/src/ass_dialogue.h
@@ -179,7 +179,13 @@ public:
 	ASS_BlockType GetType() { return BLOCK_OVERRIDE; }
 	wxString GetText();
 	void ParseTags();		// Parses tags
-	void ProcessParameters(void (*callback)(wxString,int,AssOverrideParameter*,void *),void *userData);
+
+	/// Type of callback function passed to ProcessParameters
+	typedef void (*ProcessParametersCallback)(wxString,int,AssOverrideParameter*,void *);
+	/// @brief Process parameters via callback 
+	/// @param callback The callback function to call per tag paramer
+	/// @param userData User data to pass to callback function
+	void ProcessParameters(ProcessParametersCallback callback,void *userData);
 };
 
 
@@ -237,7 +243,10 @@ public:
 	void ParseSRTTags();			// Converts tags to ass format and calls ParseASSTags+UpdateData
 	void ClearBlocks();				// Clear all blocks, ALWAYS call this after you're done processing tags
 
-	void ProcessParameters(void (*callback)(wxString,int,AssOverrideParameter*,void *userData),void *userData=NULL);	// Callback to process parameters
+	/// @brief Process parameters via callback 
+	/// @param callback The callback function to call per tag paramer
+	/// @param userData User data to pass to callback function
+	void ProcessParameters(AssDialogueBlockOverride::ProcessParametersCallback callback,void *userData=NULL);	// Callback to process parameters
 	void ConvertTagsToSRT();		// Converts tags to SRT format
 	void StripTags();				// Strips all tags from the text
 	void StripTag(wxString tagName);// Strips a specific tag from the text
diff --git a/aegisub/src/ass_override.cpp b/aegisub/src/ass_override.cpp
index 3449c5c09..43ec94d3f 100644
--- a/aegisub/src/ass_override.cpp
+++ b/aegisub/src/ass_override.cpp
@@ -163,12 +163,7 @@ wxString AssDialogueBlockOverride::GetText () {
 }
 
 
-
-/// @brief Process parameters via callback 
-/// @param callback 
-/// @param userData 
-///
-void AssDialogueBlockOverride::ProcessParameters(void (*callback)(wxString,int,AssOverrideParameter *,void *),void *userData) {
+void AssDialogueBlockOverride::ProcessParameters(AssDialogueBlockOverride::ProcessParametersCallback callback,void *userData) {
 	AssOverrideTag *curTag;
 	AssOverrideParameter *curPar;