diff --git a/CMakeLists.txt b/CMakeLists.txt
index e8b2e0df6..2848b06c8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -15,7 +15,7 @@ PROJECT(libgit2 C)
 CMAKE_MINIMUM_REQUIRED(VERSION 2.6)
 
 # Find required dependencies
-FIND_PACKAGE(zlib REQUIRED)
+FIND_PACKAGE(ZLIB REQUIRED)
 INCLUDE_DIRECTORIES(${ZLIB_INCLUDE_DIR} src)
 
 # Try finding openssl