diff --git a/ports/rocksdb/0004-zlib-findpackage.patch b/ports/rocksdb/0004-zlib-findpackage.patch
new file mode 100644
index 0000000000..25182760d3
--- /dev/null
+++ b/ports/rocksdb/0004-zlib-findpackage.patch
@@ -0,0 +1,13 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index fb3b126..45ca7b6 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -86,7 +86,7 @@ else()
+   endif()
+ 
+   if(WITH_ZLIB)
+-    find_package(zlib REQUIRED)
++    find_package(ZLIB REQUIRED)
+     add_definitions(-DZLIB)
+     include_directories(${ZLIB_INCLUDE_DIR})
+     list(APPEND THIRDPARTY_LIBS ${ZLIB_LIBRARIES})
diff --git a/ports/rocksdb/portfile.cmake b/ports/rocksdb/portfile.cmake
index 114ace627e..95642b19f3 100644
--- a/ports/rocksdb/portfile.cmake
+++ b/ports/rocksdb/portfile.cmake
@@ -13,6 +13,7 @@ vcpkg_apply_patches(
   PATCHES
     "${CMAKE_CURRENT_LIST_DIR}/0002-disable-gtest.patch"
     "${CMAKE_CURRENT_LIST_DIR}/0003-only-build-one-flavor.patch"
+    "${CMAKE_CURRENT_LIST_DIR}/0004-zlib-findpackage.patch"
     "${CMAKE_CURRENT_LIST_DIR}/use-find-package.patch"
     "${CMAKE_CURRENT_LIST_DIR}/pass-major-version.patch"
 )