diff --git a/src/gui/cam_menu.cpp b/src/gui/cam_menu.cpp
index 8b3762fc0..163d5b89b 100644
--- a/src/gui/cam_menu.cpp
+++ b/src/gui/cam_menu.cpp
@@ -348,7 +348,7 @@ int CCAMMenuHandler::handleCamMsg(const neutrino_msg_t msg, neutrino_msg_data_t
 				char * tptr = sptr;
 				int bpos = 0;
 				for(int li = 0; li < slen; li++) {
-					if((tptr[li] == 0x8A) || ((bpos > 38) && (tptr[li] == 0x20)) ) {
+					if(((unsigned char)tptr[li] == 0x8A) || ((bpos > 38) && (tptr[li] == 0x20)) ) {
 						bpos = 0;
 						tptr[li] = 0;
 						printf("CCAMMenuHandler::handleCamMsg: subtitle: %s\n", sptr);
diff --git a/src/gui/filebrowser.cpp b/src/gui/filebrowser.cpp
index 89de8df40..057a1e637 100644
--- a/src/gui/filebrowser.cpp
+++ b/src/gui/filebrowser.cpp
@@ -1437,7 +1437,7 @@ void CFileBrowser::paintSMSKey()
 
 	if(m_SMSKeyInput.getOldKey()!=0)
 	{
-		char cKey[2] = {m_SMSKeyInput.getOldKey(), 0};
+		char cKey[2] = {(char)m_SMSKeyInput.getOldKey(), 0};
 		cKey[0] = toupper(cKey[0]);
 		int len = fnt_small->getRenderWidth(cKey);
 		fnt_small->RenderString(x + width - skwidth, y + height - foheight + foheight/2 + skheight/2, len, cKey, COL_MENUHEAD_TEXT);
diff --git a/src/gui/movieplayer.cpp b/src/gui/movieplayer.cpp
index 5521c7d5d..405eeade3 100644
--- a/src/gui/movieplayer.cpp
+++ b/src/gui/movieplayer.cpp
@@ -2228,7 +2228,7 @@ bool CMoviePlayerGui::mountIso(CFile *file)
 	return false;
 }
 
-void CMoviePlayerGui::makeScreenShot(bool autoshot, bool forcover)
+void CMoviePlayerGui::makeScreenShot(bool autoshot, bool /*forcover*/)
 {
 	if (autoshot && (autoshot_done || !g_settings.auto_cover))
 		return;
diff --git a/src/nhttpd/yhttpd_core/helper.cpp b/src/nhttpd/yhttpd_core/helper.cpp
index e8bc5a235..24498b635 100644
--- a/src/nhttpd/yhttpd_core/helper.cpp
+++ b/src/nhttpd/yhttpd_core/helper.cpp
@@ -292,6 +292,8 @@ std::string json_out_error(std::string _error) {
 //-----------------------------------------------------------------------------
 // JSON: convert string to JSON-String
 //-----------------------------------------------------------------------------
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wsign-compare"
 std::string json_convert_string(std::string s) {
 	std::stringstream ss;
 	for (size_t i = 0; i < s.length(); ++i) {
@@ -305,4 +307,4 @@ std::string json_convert_string(std::string s) {
 	}
 	return ss.str();
 }
-
+#pragma GCC diagnostic pop