diff --git a/desmume/src/ROMReader.cpp b/desmume/src/ROMReader.cpp
index d1b757503..96d4767ac 100644
--- a/desmume/src/ROMReader.cpp
+++ b/desmume/src/ROMReader.cpp
@@ -195,6 +195,8 @@ void * ZIPROMReaderInit(const char * filename)
 	{
 		char tmp1[1024];
 		char tmp2[1024];
+		memset(tmp1,0,sizeof(tmp1));
+		memset(tmp2,0,sizeof(tmp2));
 		strncpy(tmp1, filename, strlen(filename) - 4);
 		sprintf(tmp2, "%s/%s", tmp1, dirent->d_name);
 		return zzip_fopen(tmp2, "rb");