diff --git a/src/merge/mkvmerge.cpp b/src/merge/mkvmerge.cpp
index c327832ad..ff1018a74 100644
--- a/src/merge/mkvmerge.cpp
+++ b/src/merge/mkvmerge.cpp
@@ -682,7 +682,7 @@ parse_arg_display_dimensions(const std::string s,
 
   std::vector<std::string> dims = split(parts[1], "x", 2);
   int64_t id = 0;
-  int w, h;
+  int w = 0, h = 0;
   if ((dims.size() != 2) || !parse_number(parts[0], id) || !parse_number(dims[0], w) || !parse_number(dims[1], h) || (0 >= w) || (0 >= h))
     mxerror(boost::format(Y("Display dimensions: not given in the form <TID>:<width>x<height>, e.g. 1:640x480 (argument was '%1%').\n")) % s);
 
diff --git a/src/merge/timecode_factory.cpp b/src/merge/timecode_factory.cpp
index f99dd887a..b76f34030 100644
--- a/src/merge/timecode_factory.cpp
+++ b/src/merge/timecode_factory.cpp
@@ -35,7 +35,7 @@ timecode_factory_c::create(const std::string &file_name,
   }
 
   std::string line;
-  int version;
+  int version = -1;
   if (!in->getline2(line) || !balg::istarts_with(line, "# timecode format v") || !parse_number(&line[strlen("# timecode format v")], version))
     mxerror(boost::format(Y("The timecode file '%1%' contains an unsupported/unrecognized format line. The very first line must look like '# timecode format v1'.\n"))
             % file_name);