diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8edd692..2232661 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -26,7 +26,7 @@ elseif (CMAKE_SYSTEM_NAME STREQUAL "Windows")
 	target_compile_definitions(nmrpflash PUBLIC -D_WIN32_WINNT=0x0600 -DWIN32_LEAN_AND_MEAN -D__USE_MINGW_ANSI_STDIO)
 	target_link_libraries(nmrpflash -lwpcap -lPacket -liphlpapi -lws2_32 -ladvapi32)
 	target_include_directories(nmrpflash PUBLIC ./Npcap/Include)
-	if (CMAKE_SIZE_OF_VOID_P EQUAL 8)
+	if (CMAKE_SIZEOF_VOID_P EQUAL 8)
 		target_link_directories(nmrpflash PUBLIC ./Npcap/Lib/x64)
 	else()
 		target_link_directories(nmrpflash PUBLIC ./Npcap/Lib)