diff --git a/build.zig b/build.zig
index 2e65f5c..947c212 100644
--- a/build.zig
+++ b/build.zig
@@ -65,12 +65,12 @@ pub fn build(b: *std.build.Builder) !void {
             try c_sources.append("src/windows/WinMiniFB.c");
             lib.linkSystemLibrary("gdi32");
             switch (use_backend) {
-                .gdi, .default => {},
-                .opengl => {
+                .opengl, .default => {
                     try c_flags.append("-DUSE_OPENGL_API");
                     try c_sources.append("src/gl/MiniFB_GL.c");
                     lib.linkSystemLibraryName("opengl32");
                 },
+                .gdi => {},
                 else => {
                     return ConfigError.BackendNotSupported;
                 }
@@ -80,11 +80,7 @@ pub fn build(b: *std.build.Builder) !void {
             try c_sources.append("src/MiniFB_linux.c");
             lib.linkSystemLibrary("rt");
             switch (use_backend) {
-                .x11, .default => {
-                    try c_sources.append("src/x11/X11MiniFB.c");
-                    lib.linkSystemLibrary("X11");
-                },
-                .opengl => {
+                .opengl, .default => {
                     try c_sources.append("src/x11/X11MiniFB.c");
                     lib.linkSystemLibrary("X11");
 
@@ -92,6 +88,10 @@ pub fn build(b: *std.build.Builder) !void {
                     try c_sources.append("src/gl/MiniFB_GL.c");
                     lib.linkSystemLibrary("GL");
                 },
+                .x11 => {
+                    try c_sources.append("src/x11/X11MiniFB.c");
+                    lib.linkSystemLibrary("X11");
+                },
                 .wayland => {
                     try c_sources.append("src/wayland/WaylandMiniFB.c");
                     lib.linkSystemLibrary("wayland-client");