diff --git a/backends/CMakeLists.txt b/backends/CMakeLists.txt
index 1306f711174b61141d31497660eacc413ad27d11..fb4ca0e200338b0b58043a7f270baca6b3c521c6 100644
--- a/backends/CMakeLists.txt
+++ b/backends/CMakeLists.txt
@@ -13,7 +13,9 @@ if (PROTOBUF_FOUND)
 
 
 if (NOT WIN32)
-	ADD_SUBDIRECTORY(smstools3)
+	if(ENABLE_SMSTOOLS3)
+		ADD_SUBDIRECTORY(smstools3)
+	endif()
 	ADD_SUBDIRECTORY(frotz)
  	if(YAHOO2_FOUND)
 		ADD_SUBDIRECTORY(libyahoo2)