diff --git a/engine.cmake b/engine.cmake
index 33b0776..5633125 100644
--- a/engine.cmake
+++ b/engine.cmake
@@ -149,6 +149,10 @@ if (WIN32)
 	target_sources(Spectre PRIVATE ${ENGINE_PLATFORM_WIN32_SRC})
 else()
 	target_sources(Spectre PRIVATE ${ENGINE_PLATFORM_UNIX_SRC})
+
+	# Unix needs to link against X11
+	find_package(X11 REQUIRED COMPONENTS Xrandr)
+	target_link_libraries(Spectre PRIVATE X11::X11 X11::Xrandr)
 endif (WIN32)
 
 # Select graphics API