diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 132f243..f00fc8f 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -57,6 +57,7 @@ else()
     endif()
     find_package(WolfSSL)
     find_package(MbedTLS)
+    find_package(ZLIB)
 
 	if(UHTTPD_USE_OPENSSL)
 		if (NOT OPENSSL_FOUND)
@@ -97,7 +98,11 @@ else()
 	elseif(UHTTPD_USE_MBEDTLS)
 		set(SSL_NAME "MbedTLS(PolarSSL)")
 		set(SSL_INC ${MBEDTLS_INCLUDE_DIR})
-		set(SSL_LIB ${MBEDTLS_LIBRARIES})
+		if(ZLIB_FOUND)
+			set(SSL_LIB ${MBEDTLS_LIBRARIES} ${ZLIB_LIBRARIES})
+		else()
+			set(SSL_LIB ${MBEDTLS_LIBRARIES})
+		endif()
 		set(UHTTPD_HAVE_MBEDTLS_CONFIG 1)
 	endif()