diff --git a/src/citra_qt/CMakeLists.txt b/src/citra_qt/CMakeLists.txt
index 8b543c731e..fb2e8742fd 100644
--- a/src/citra_qt/CMakeLists.txt
+++ b/src/citra_qt/CMakeLists.txt
@@ -231,6 +231,9 @@ target_compile_definitions(citra-qt PRIVATE
 
     # Disable implicit type narrowing in signal/slot connect() calls.
     -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT
+
+    # Disable unsafe overloads of QProcess' start() function.
+    -DQT_NO_PROCESS_COMBINED_ARGUMENT_START
 )
 
 if (CITRA_ENABLE_COMPATIBILITY_REPORTING)