diff --git a/mkspecs/common/wasm/wasm.conf b/mkspecs/common/wasm/wasm.conf
index adad9992006..2a5ea231452 100644
--- a/mkspecs/common/wasm/wasm.conf
+++ b/mkspecs/common/wasm/wasm.conf
@@ -26,7 +26,7 @@ load(emcc_ver)
 }
 
 # Declare async functions
-QMAKE_LFLAGS += -s \'ASYNCIFY_IMPORTS=qt_asyncify_suspend_js,qt_asyncify_resume_js\'
+QMAKE_LFLAGS += -s ASYNCIFY_IMPORTS=qt_asyncify_suspend_js,qt_asyncify_resume_js
 
 EMCC_COMMON_LFLAGS += \
     -s WASM=1 \