thodg/libgit2

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c3c7a15..cecccb3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -271,7 +271,7 @@ IF (LIBSSH2_FOUND)
 	SET(LIBGIT2_PC_REQUIRES "${LIBGIT2_PC_REQUIRES} libssh2")
 	SET(SSH_LIBRARIES ${LIBSSH2_LIBRARIES})
 
-	CHECK_LIBRARY_EXISTS(${LIBSSH2_LIBRARIES} libssh2_userauth_publickey_frommemory "" HAVE_LIBSSH2_MEMORY_CREDENTIALS)
+	CHECK_LIBRARY_EXISTS("${LIBSSH2_LIBRARIES}" libssh2_userauth_publickey_frommemory "" HAVE_LIBSSH2_MEMORY_CREDENTIALS)
 	IF (HAVE_LIBSSH2_MEMORY_CREDENTIALS)
 		ADD_DEFINITIONS(-DGIT_SSH_MEMORY_CREDENTIALS)
 	ENDIF()