diff --git a/src/wl_init.c b/src/wl_init.c
index 8a5d98a46..1b4cbced2 100644
--- a/src/wl_init.c
+++ b/src/wl_init.c
@@ -132,7 +132,7 @@ static void pointerHandleAxis(void* data,
 {
     _GLFWwindow* window = _glfw.wl.pointerFocus;
     double scrollFactor;
-    double x, y;
+    double x = 0.0, y = 0.0;
 
     if (!window)
         return;