diff --git a/cmake/ssl.cmake b/cmake/ssl.cmake
index 1b2a1729f2dc..043545c33d96 100644
--- a/cmake/ssl.cmake
+++ b/cmake/ssl.cmake
@@ -166,7 +166,7 @@ MACRO (MYSQL_CHECK_SSL)
     # Encoded as MNNFFPPS: major minor fix patch status
     FILE(STRINGS "${OPENSSL_INCLUDE_DIR}/openssl/opensslv.h"
       OPENSSL_VERSION_NUMBER
-      REGEX "^#define[\t ]+OPENSSL_VERSION_NUMBER[\t ]+0x[0-9].*"
+      REGEX "^#[\t ]+define[\t ]+OPENSSL_VERSION_NUMBER[\t ]+0x[0-9].*"
     )
     STRING(REGEX REPLACE
       "^.*OPENSSL_VERSION_NUMBER[\t ]+0x([0-9]).*$" "\\1"