diff --git a/Userland/Libraries/LibCompress/Gzip.cpp b/Userland/Libraries/LibCompress/Gzip.cpp
index 8feb409cf1..5035245d09 100644
--- a/Userland/Libraries/LibCompress/Gzip.cpp
+++ b/Userland/Libraries/LibCompress/Gzip.cpp
@@ -106,14 +106,20 @@ size_t GzipDecompressor::read(Bytes bytes)
 
         return nread;
     } else {
-        BlockHeader header;
-        m_input_stream >> Bytes { &header, sizeof(header) };
+        m_partial_header_offset += m_input_stream.read(Bytes { m_partial_header, sizeof(BlockHeader) }.slice(m_partial_header_offset));
 
-        if (m_input_stream.handle_any_error()) {
+        if (m_input_stream.handle_any_error() || m_input_stream.unreliable_eof()) {
             m_eof = true;
             return 0;
         }
 
+        if (m_partial_header_offset < sizeof(BlockHeader)) {
+            return 0; // partial header read
+        }
+        m_partial_header_offset = 0;
+
+        BlockHeader header = *(reinterpret_cast<BlockHeader*>(m_partial_header));
+
         if (!header.valid_magic_number() || !header.supported_by_implementation()) {
             set_fatal_error();
             return 0;
diff --git a/Userland/Libraries/LibCompress/Gzip.h b/Userland/Libraries/LibCompress/Gzip.h
index 0b7d21068a..921a2fb7b6 100644
--- a/Userland/Libraries/LibCompress/Gzip.h
+++ b/Userland/Libraries/LibCompress/Gzip.h
@@ -91,6 +91,8 @@ private:
     Member& current_member() { return m_current_member.value(); }
 
     InputStream& m_input_stream;
+    u8 m_partial_header[sizeof(BlockHeader)];
+    size_t m_partial_header_offset { 0 };
     Optional<Member> m_current_member;
 
     bool m_eof { false };