diff --git a/tests/checkasm/sw_ops.c b/tests/checkasm/sw_ops.c
index b20a7559f1..0eaca21402 100644
--- a/tests/checkasm/sw_ops.c
+++ b/tests/checkasm/sw_ops.c
@@ -117,10 +117,10 @@ static void check_ops(const char *report, const unsigned ranges[NB_PLANES],
 
     declare_func(void, const SwsOpExec *, const void *, int bx, int y, int bx_end, int y_end);
 
-    DECLARE_ALIGNED_64(char, src0)[NB_PLANES][LINES][PIXELS * sizeof(uint32_t[4])];
-    DECLARE_ALIGNED_64(char, src1)[NB_PLANES][LINES][PIXELS * sizeof(uint32_t[4])];
-    DECLARE_ALIGNED_64(char, dst0)[NB_PLANES][LINES][PIXELS * sizeof(uint32_t[4])];
-    DECLARE_ALIGNED_64(char, dst1)[NB_PLANES][LINES][PIXELS * sizeof(uint32_t[4])];
+    static DECLARE_ALIGNED_64(char, src0)[NB_PLANES][LINES][PIXELS * sizeof(uint32_t[4])];
+    static DECLARE_ALIGNED_64(char, src1)[NB_PLANES][LINES][PIXELS * sizeof(uint32_t[4])];
+    static DECLARE_ALIGNED_64(char, dst0)[NB_PLANES][LINES][PIXELS * sizeof(uint32_t[4])];
+    static DECLARE_ALIGNED_64(char, dst1)[NB_PLANES][LINES][PIXELS * sizeof(uint32_t[4])];
 
     if (!ctx)
         return;