diff --git a/scwx-qt/scwx-qt.cmake b/scwx-qt/scwx-qt.cmake
index 7fef2526..3a239c22 100644
--- a/scwx-qt/scwx-qt.cmake
+++ b/scwx-qt/scwx-qt.cmake
@@ -40,6 +40,7 @@ set(SRC_MAIN source/scwx/qt/main/main_window.cpp)
 set(UI_MAIN  source/scwx/qt/main/main_window.ui)
 set(HDR_CONFIG source/scwx/qt/config/radar_site.hpp)
 set(SRC_CONFIG source/scwx/qt/config/radar_site.cpp)
+set(SRC_EXTERNAL source/scwx/qt/external/stb_rect_pack.cpp)
 set(HDR_GL source/scwx/qt/gl/gl.hpp
            source/scwx/qt/gl/gl_context.hpp
            source/scwx/qt/gl/shader_program.hpp
@@ -147,6 +148,7 @@ set(PROJECT_SOURCES ${HDR_MAIN}
                     ${SRC_MAIN}
                     ${HDR_CONFIG}
                     ${SRC_CONFIG}
+                    ${SRC_EXTERNAL}
                     ${HDR_GL}
                     ${SRC_GL}
                     ${HDR_GL_DRAW}
@@ -181,6 +183,7 @@ source_group("Header Files\\main"     FILES ${HDR_MAIN})
 source_group("Source Files\\main"     FILES ${SRC_MAIN})
 source_group("Header Files\\config"   FILES ${HDR_CONFIG})
 source_group("Source Files\\config"   FILES ${SRC_CONFIG})
+source_group("Source Files\\external" FILES ${SRC_EXTERNAL})
 source_group("Header Files\\gl"       FILES ${HDR_GL})
 source_group("Source Files\\gl"       FILES ${SRC_GL})
 source_group("Header Files\\gl\\draw" FILES ${HDR_GL_DRAW})
diff --git a/scwx-qt/source/scwx/qt/external/stb_rect_pack.cpp b/scwx-qt/source/scwx/qt/external/stb_rect_pack.cpp
new file mode 100644
index 00000000..32d48134
--- /dev/null
+++ b/scwx-qt/source/scwx/qt/external/stb_rect_pack.cpp
@@ -0,0 +1,2 @@
+#define STB_RECT_PACK_IMPLEMENTATION
+#include <stb_rect_pack.h>