diff --git a/config.pri b/config.pri
index 264dae8..9c03be9 100644
--- a/config.pri
+++ b/config.pri
@@ -35,7 +35,7 @@ win32:{
     CHART_BUILD_BIN_DIR = $$replace(CHART_BUILD_BIN_DIR, "/","\\")
     CHART_BUILD_PLUGIN_DIR = $$replace(CHART_BUILD_PLUGIN_DIR, "/","\\")
     CHART_BUILD_DOC_DIR = $$replace(CHART_BUILD_DOC_DIR, "/","\\")
-    CHART_BUILD_LIB_DIR = CHART_BUILD_BIN_DIR
+    CHART_BUILD_LIB_DIR = $$CHART_BUILD_BIN_DIR
 }
 
 mac: {