diff --git a/renderdoc/os/win32/win32_process.cpp b/renderdoc/os/win32/win32_process.cpp
index d3095c4b3..331669954 100644
--- a/renderdoc/os/win32/win32_process.cpp
+++ b/renderdoc/os/win32/win32_process.cpp
@@ -391,7 +391,7 @@ uint32_t Process::CreateAndInjectIntoProcess(const char *app, const char *workin
 
 	paramsAlloc = new wchar_t[len];
 
-	RDCEraseMem(paramsAlloc, len);
+	RDCEraseMem(paramsAlloc, len*sizeof(wchar_t));
 
 	wcscpy_s(paramsAlloc, len, L"\"");
 	wcscat_s(paramsAlloc, len, wapp.c_str());
diff --git a/renderdoc/serialise/string_utils.h b/renderdoc/serialise/string_utils.h
index c16ad6b26..58d15646c 100644
--- a/renderdoc/serialise/string_utils.h
+++ b/renderdoc/serialise/string_utils.h
@@ -45,7 +45,7 @@ template<class strType> strType basename(const strType &path)
 	if(base[base.length()-1] == '/' || base[base.length()-1] == '\\')
 		base.erase(base.size()-1);
 
-	typename strType::value_type pathSep[2] = { '\\', '/' };
+	typename strType::value_type pathSep[3] = { '\\', '/', 0 };
 
 	size_t offset = base.find_last_of(pathSep);
 
@@ -65,7 +65,7 @@ template<class strType> strType dirname(const strType &path)
 	if(base[base.length()-1] == '/' || base[base.length()-1] == '\\')
 		base.erase(base.size()-1);
 	
-	typename strType::value_type pathSep[2] = { '\\', '/' };
+	typename strType::value_type pathSep[3] = { '\\', '/', 0 };
 
 	size_t offset = base.find_last_of(pathSep);