diff --git a/Libraries/LibCompress/GenericZlib.cpp b/Libraries/LibCompress/GenericZlib.cpp
index 1ab1d992225..6a49950b894 100644
--- a/Libraries/LibCompress/GenericZlib.cpp
+++ b/Libraries/LibCompress/GenericZlib.cpp
@@ -15,6 +15,9 @@ static Error handle_zlib_error(int ret)
     switch (ret) {
     case Z_ERRNO:
         return Error::from_errno(errno);
+    case Z_NEED_DICT:
+        // Z_NEED_DICT if the input data needed a dictionary
+        return Error::from_string_literal("zlib data needs dictionary");
     case Z_DATA_ERROR:
         // Z_DATA_ERROR if the input data was corrupted
         return Error::from_string_literal("zlib data error");