--- libde265-1.0.18/libde265/fallback-motion.cc.orig	2026-03-19 11:38:53.000000000 +0100
+++ libde265-1.0.18/libde265/fallback-motion.cc	2026-04-06 09:24:05.051839128 +0200
@@ -184,6 +184,7 @@
 }
 
 #include <stdlib.h>
+#include <alloca.h>
 
 void put_weighted_pred_16_fallback(uint16_t *dst, ptrdiff_t dststride,
                                    const int16_t *src, ptrdiff_t srcstride,
--- libde265-1.0.18/libde265/refpic.cc.orig	2026-03-19 11:38:53.000000000 +0100
+++ libde265-1.0.18/libde265/refpic.cc	2026-04-06 09:26:39.600959973 +0200
@@ -26,7 +26,7 @@
 #include <stdlib.h>
 #if defined(_MSC_VER) || defined(__MINGW32__)
 # include <malloc.h>
-#elif defined(HAVE_ALLOCA_H)
+#else
 # include <alloca.h>
 #endif
 
--- libde265-1.0.18/libde265/pps.cc.orig	2026-03-19 11:38:53.000000000 +0100
+++ libde265-1.0.18/libde265/pps.cc	2026-04-06 09:28:46.783740864 +0200
@@ -27,7 +27,7 @@
 #include <string.h>
 #if defined(_MSC_VER) || defined(__MINGW32__)
 # include <malloc.h>
-#elif defined(HAVE_ALLOCA_H)
+#else
 # include <alloca.h>
 #endif