Issue #11121: Fix building with --enable-shared.
diff --git a/configure.in b/configure.in
index f3a7ee9..419a93c 100644
--- a/configure.in
+++ b/configure.in
@@ -738,7 +738,7 @@
 	  BLDLIBRARY='-Wl,-R,$(LIBDIR) -L. -lpython$(LDVERSION)'
 	  RUNSHARED=LD_LIBRARY_PATH=`pwd`:${LD_LIBRARY_PATH}
 	  INSTSONAME="$LDLIBRARY".$SOVERSION
-	  if test $with_pydebug == no
+	  if test "$with_pydebug" != yes
 	  then
 	      PY3LIBRARY=libpython3.so
 	  fi
@@ -753,8 +753,7 @@
 		;;
 	  esac
 	  INSTSONAME="$LDLIBRARY".$SOVERSION
-	  PY3LIBRARY=libpython3.so
-	  if test $with_pydebug == no
+	  if test "$with_pydebug" != yes
           then
 	      PY3LIBRARY=libpython3.so
 	  fi