diff --git a/setup.py b/setup.py
index eba742649..242dbebf9 100644
--- a/setup.py
+++ b/setup.py
@@ -488,7 +488,7 @@ def _progress_hook(count, block_size, total_size):
             os.rename("ltmain.sh.new", "ltmain.sh")
 
             print("Configuring igraph...")
-            retcode = subprocess.call("CFLAGS=-fPIC CXXFLAGS=-fPIC ./configure --disable-tls --disable-gmp",
+            retcode = subprocess.call("CFLAGS=-fPIC CXXFLAGS=-fPIC ./configure --enable-tls --enable-debug --disable-gmp",
                     shell=True)
             if retcode:
                 return False