diff --git a/djvu.c b/djvu.c
index 4a2a082e3..79873592b 100644
--- a/djvu.c
+++ b/djvu.c
@@ -535,6 +535,7 @@ static int reflowPage(lua_State *L) {
 		pthread_attr_init(&attr);
 		pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 		pthread_create(&rf_thread, &attr, k2pdfopt_reflow_bmp, (void*) kctx);
+		pthread_attr_destroy(&attr);
 	} else {
 		k2pdfopt_reflow_bmp(kctx);
 	}
diff --git a/pdf.c b/pdf.c
index 2673eb682..5b0065342 100644
--- a/pdf.c
+++ b/pdf.c
@@ -619,6 +619,7 @@ static int reflowPage(lua_State *L) {
 		pthread_attr_init(&attr);
 		pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 		pthread_create( &rf_thread, &attr, k2pdfopt_reflow_bmp, (void*) kctx);
+		pthread_attr_destroy(&attr);
 	} else {
 		k2pdfopt_reflow_bmp(kctx);
 	}