diff --git a/src/unlocker/cert_manager.cpp b/src/unlocker/cert_manager.cpp
index eee4079..cef01cc 100644
--- a/src/unlocker/cert_manager.cpp
+++ b/src/unlocker/cert_manager.cpp
@@ -133,8 +133,9 @@ bool CertManager::GenerateCA()
 
     Log::info("Generated new CA key and certificate files. Installing to Windows Root CA store automatically...");
 
-    STARTUPINFOA si = {sizeof(si)};
-    PROCESS_INFORMATION pi;
+    STARTUPINFOA si = {0};
+    si.cb = sizeof(si);
+    PROCESS_INFORMATION pi = {0};
     char cmd[] = "certutil.exe -user -addstore root ca_cert.pem";
     if (CreateProcessA(NULL, cmd, NULL, NULL, FALSE, CREATE_NO_WINDOW, NULL, NULL, &si, &pi))
     {