diff --git a/glfw/src/errors.zig b/glfw/src/errors.zig
index 292a4339..078e0efa 100644
--- a/glfw/src/errors.zig
+++ b/glfw/src/errors.zig
@@ -84,6 +84,7 @@ pub const Error = error{
 fn convertError(e: c_int) Error!void {
     return switch (e) {
         c.GLFW_NO_ERROR => {},
+        c.GLFW_NOT_INITIALIZED => unreachable,
         c.GLFW_NO_CURRENT_CONTEXT => Error.NoCurrentContext,
         c.GLFW_INVALID_ENUM => Error.InvalidEnum,
         c.GLFW_INVALID_VALUE => Error.InvalidValue,