diff --git a/amdgpu/amdgpu_cs.c b/amdgpu/amdgpu_cs.c
index c7910ada..4da98214 100644
--- a/amdgpu/amdgpu_cs.c
+++ b/amdgpu/amdgpu_cs.c
@@ -32,6 +32,9 @@
 #include <pthread.h>
 #include <sched.h>
 #include <sys/ioctl.h>
+#ifdef HAVE_ALLOCA_H
+# include <alloca.h>
+#endif
 
 #include "xf86drm.h"
 #include "amdgpu_drm.h"
diff --git a/tests/amdgpu/basic_tests.c b/tests/amdgpu/basic_tests.c
index 78740393..e489e6e8 100644
--- a/tests/amdgpu/basic_tests.c
+++ b/tests/amdgpu/basic_tests.c
@@ -28,6 +28,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
+#ifdef HAVE_ALLOCA_H
+# include <alloca.h>
+#endif
 
 #include "CUnit/Basic.h"