diff --git a/rtdata/languages/default b/rtdata/languages/default
index 5df352152..bae093a47 100644
--- a/rtdata/languages/default
+++ b/rtdata/languages/default
@@ -148,7 +148,7 @@ FILEBROWSER_POPUPTRASH;Move to trash
 FILEBROWSER_POPUPUNRANK;Unrank
 FILEBROWSER_POPUPUNTRASH;Remove from trash
 FILEBROWSER_QUERYBUTTONHINT;Clear the Find query
-FILEBROWSER_QUERYHINT;Type filenames to search for. Supports partial filenames. Separate search terms using commas, e.g.\n<i>1001,1004,1199</i>\n\nShortcuts:\n<b>Ctrl-f</b> - focus the Find box,\n<b>Enter</b> - search,\n<b>Esc</b> - clear the Find box,\n<b>Shift-Esc</b> - defocus the Find box.
+FILEBROWSER_QUERYHINT;Type filenames to search for. Supports partial filenames. Separate the search terms using commas, e.g.\n<i>1001,1004,1199</i>\n\nExclude search terms by prefixing them with <i>!=</i>\ne.g.\n<i>!=1001,1004,1199</i>\n\nShortcuts:\n<b>Ctrl-f</b> - focus the Find box,\n<b>Enter</b> - search,\n<b>Esc</b> - clear the Find box,\n<b>Shift-Esc</b> - defocus the Find box.
 FILEBROWSER_QUERYLABEL; Find: 
 FILEBROWSER_RANK1_TOOLTIP;Rank 1 *\nShortcut: <b>Shift-1</b>
 FILEBROWSER_RANK2_TOOLTIP;Rank 2 *\nShortcut: <b>Shift-2</b>
diff --git a/rtgui/filebrowser.cc b/rtgui/filebrowser.cc
index 91828af61..5a0ff73be 100755
--- a/rtgui/filebrowser.cc
+++ b/rtgui/filebrowser.cc
@@ -1210,11 +1210,24 @@ bool FileBrowser::checkFilter (ThumbBrowserEntryBase* entryb) { // true -> entry
     	FileName = FileName.uppercase();
     	//printf("FileBrowser::checkFilter FileName = '%s'; find() result= %i \n",FileName.c_str(), FileName.find(filter.queryFileName.uppercase()));
     	
+    	Glib::ustring decodedQueryFileName;
+    	bool MatchEqual;
+
+    	// Determine the match mode - check if the first 2 characters are equal to "!="
+    	if (filter.queryFileName.find("!=")==0){
+    		decodedQueryFileName = filter.queryFileName.substr (2,filter.queryFileName.length()-2);
+    		MatchEqual = false;
+    	}
+    	else {
+    		decodedQueryFileName = filter.queryFileName;
+    		MatchEqual = true;
+    	}
+
     	// Consider that queryFileName consist of comma separated values (FilterString)
     	// Evaluate if ANY of these FilterString are contained in the filename
     	// This will construct OR filter within the filter.queryFileName
     	int iFilenameMatch=0;
-    	std::vector<Glib::ustring> vFilterStrings = Glib::Regex::split_simple(",", filter.queryFileName.uppercase());
+    	std::vector<Glib::ustring> vFilterStrings = Glib::Regex::split_simple(",", decodedQueryFileName.uppercase());
     	for(int i=0; i<vFilterStrings.size(); i++) {
     		// ignore empty vFilterStrings. Otherwise filter will always return true if
     		// e.g. filter.queryFileName ends on "," and will stop being a filter
@@ -1222,8 +1235,15 @@ bool FileBrowser::checkFilter (ThumbBrowserEntryBase* entryb) { // true -> entry
     			if (FileName.find(vFilterStrings.at(i))!=-1) iFilenameMatch++;
     		}
     	}
-    	if (iFilenameMatch==0) //none of the vFilterStrings found in FileName
-        	 return false;
+
+    	if (MatchEqual==true){
+    		if (iFilenameMatch==0) //none of the vFilterStrings found in FileName
+    		  	return false;
+    	}
+    	else{
+    		if (iFilenameMatch>0) // match is found for at least one of vFilterStrings in FileName
+    			return false;
+    	}
 
     	/*experimental Regex support, this is unlikely to be useful to photographers*/
     	//bool matchfound=Glib::Regex::match_simple(filter.queryFileName.uppercase(),FileName);