diff --git a/desmume/src/frontend/posix/cli/main.cpp b/desmume/src/frontend/posix/cli/main.cpp
index fee0b4253..a8edd3a1f 100644
--- a/desmume/src/frontend/posix/cli/main.cpp
+++ b/desmume/src/frontend/posix/cli/main.cpp
@@ -574,9 +574,9 @@ int main(int argc, char ** argv) {
     slot2_Init();
     slot2_Change((NDS_SLOT2_TYPE)slot2_device_type);
 
-  if ( !g_thread_supported()) {
+#if !g_thread_supported()
     g_thread_init( NULL);
-  }
+#endif
 
   driver = new BaseDriver();
   
diff --git a/desmume/src/frontend/posix/gtk-glade/main.cpp b/desmume/src/frontend/posix/gtk-glade/main.cpp
index 623b1a246..aa5667644 100755
--- a/desmume/src/frontend/posix/gtk-glade/main.cpp
+++ b/desmume/src/frontend/posix/gtk-glade/main.cpp
@@ -539,8 +539,9 @@ int main(int argc, char *argv[]) {
       fprintf(stderr, "Warning: X11 not thread-safe\n");
     }
 
-  if (!g_thread_supported())
-    g_thread_init( NULL);
+#if !g_thread_supported()
+  g_thread_init( NULL);
+#endif
 
   gtk_init(&argc, &argv);
 
diff --git a/desmume/src/frontend/posix/gtk/main.cpp b/desmume/src/frontend/posix/gtk/main.cpp
index 0b8ba7d0f..9dcbd494a 100644
--- a/desmume/src/frontend/posix/gtk/main.cpp
+++ b/desmume/src/frontend/posix/gtk/main.cpp
@@ -3511,8 +3511,9 @@ int main (int argc, char *argv[])
       fprintf(stderr, "Warning: X11 not thread-safe\n");
     }
 
-  if (!g_thread_supported())
+#if !g_thread_supported()
     g_thread_init( NULL);
+#endif
 
   gtk_init(&argc, &argv);