diff --git a/CMakeLists.txt b/CMakeLists.txt
index 05491ce..7b0d029 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -276,7 +276,9 @@ include(CheckSymbolExists)
 set(CMAKE_REQUIRED_DEFINITIONS -D_GNU_SOURCE)
 set(CMAKE_REQUIRED_LIBRARIES pthread)
 check_symbol_exists(pthread_gettid_np "pthread.h" HAVE_PTHREAD_GETTID_NP)
-target_compile_definitions(wibo PRIVATE -DHAVE_PTHREAD_GETTID_NP=${HAVE_PTHREAD_GETTID_NP})
+if (HAVE_PTHREAD_GETTID_NP)
+    target_compile_definitions(wibo PRIVATE -DHAVE_PTHREAD_GETTID_NP=1)
+endif()
 
 find_package(Python3 COMPONENTS Interpreter REQUIRED)
 
diff --git a/src/processes_common.cpp b/src/processes_common.cpp
index 965f24d..183d863 100644
--- a/src/processes_common.cpp
+++ b/src/processes_common.cpp
@@ -353,7 +353,7 @@ std::vector<std::string> splitCommandLine(const char *commandLine) {
 }
 
 DWORD getThreadId() {
-#if HAVE_PTHREAD_GETTID_NP
+#if defined(HAVE_PTHREAD_GETTID_NP)
 	pid_t threadId = pthread_gettid_np(pthread_self());
 #elif defined(__linux__)
 	pid_t threadId = gettid();