diff --git a/cmake/HalleyProject.cmake b/cmake/HalleyProject.cmake
index 4a94f31c46..1bb4c25f51 100644
--- a/cmake/HalleyProject.cmake
+++ b/cmake/HalleyProject.cmake
@@ -186,7 +186,7 @@ if (USE_OPENGL)
 	add_definitions(-DWITH_OPENGL)
 	find_package(OpenGL REQUIRED)
 	if (${CMAKE_SYSTEM_NAME} MATCHES "Linux")
-		find_library(X11 REQUIRED)
+		find_package(X11 REQUIRED)
 	else()
 		set(X11_LIBRARIES "")
 	endif ()