diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6d7c0ee..9ff911a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -109,6 +109,9 @@ IF(LIBTINS_ENABLE_DOT11)
             MESSAGE(STATUS "Enabling WPA2 decryption support.")
         ELSE()
             MESSAGE(WARNING "Disabling WPA2 decryption support since OpenSSL was not found")
+            # Default this to empty strings
+            SET(OPENSSL_INCLUDE_DIR "")
+            SET(OPENSSL_LIBRARIES "")
         ENDIF()
     ELSE(LIBTINS_ENABLE_WPA2)
         MESSAGE(STATUS "Disabling WPA2 decryption support.")