diff --git a/config.def.h b/config.def.h
index a8f4049b64..d54a19c273 100644
--- a/config.def.h
+++ b/config.def.h
@@ -203,7 +203,13 @@
 /* Fullscreen */
 
 /* To start in Fullscreen, or not. */
+
+#ifdef HAVE_STEAM
+/* Start in fullscreen mode for Steam build */
+#define DEFAULT_FULLSCREEN true
+#else
 #define DEFAULT_FULLSCREEN false
+#endif
 
 /* To use windowed mode or not when going fullscreen. */
 #define DEFAULT_WINDOWED_FULLSCREEN true
diff --git a/qb/config.libs.sh b/qb/config.libs.sh
index 76b7864b64..51b70ea12a 100644
--- a/qb/config.libs.sh
+++ b/qb/config.libs.sh
@@ -524,6 +524,11 @@ if [ "$HAVE_MENU" != 'no' ]; then
    fi
 fi
 
+if [ "$HAVE_STEAM" = 'yes' ]; then
+   add_opt ONLINE_UPDATER no
+   die : 'Notice: Steam build enabled, disabling online updater as well.'
+fi
+
 check_enabled CXX SLANG slang 'The C++ compiler is' false
 check_enabled CXX GLSLANG glslang 'The C++ compiler is' false
 check_enabled CXX SPIRV_CROSS SPIRV-Cross 'The C++ compiler is' false
diff --git a/qb/config.params.sh b/qb/config.params.sh
index 59a14c2716..d93e855302 100644
--- a/qb/config.params.sh
+++ b/qb/config.params.sh
@@ -164,3 +164,4 @@ C89_SPIRV_CROSS=no
 HAVE_METAL=no              # Metal support (macOS-only)
 C89_METAL=no
 HAVE_NETWORK_VIDEO=no
+HAVE_STEAM=no              # Enable Steam build