diff --git a/flamingo/flamingo.c b/flamingo/flamingo.c
index e0c9ac2..b77efe8 100644
--- a/flamingo/flamingo.c
+++ b/flamingo/flamingo.c
@@ -1,6 +1,9 @@
 // This Source Form is subject to the terms of the AQUA Software License,
 // v. 1.0. Copyright (c) 2024 Aymeric Wibo
 
+#define __STDC_WANT_LIB_EXT2__ \
+	1 // ISO/IEC TR 24731-2:2010 standard library extensions
+
 #if __linux__
 # define _GNU_SOURCE
 #endif