diff --git a/libavcodec/tscc2.c b/libavcodec/tscc2.c
index 487af5462c..92210f7d39 100644
--- a/libavcodec/tscc2.c
+++ b/libavcodec/tscc2.c
@@ -90,14 +90,14 @@ static av_cold int init_vlcs(TSCC2Context *c)
     return 0;
 }
 
-#define DEQUANT(val, q) ((q * val + 0x80) >> 8)
+#define DEQUANT(val, q) (((q) * (val) + 0x80) >> 8)
 #define DCT1D(d0, d1, d2, d3, s0, s1, s2, s3, OP) \
     OP(d0, 5 * ((s0) + (s1) + (s2)) + 2 * (s3));  \
     OP(d1, 5 * ((s0) - (s2) - (s3)) + 2 * (s1));  \
     OP(d2, 5 * ((s0) - (s2) + (s3)) - 2 * (s1));  \
     OP(d3, 5 * ((s0) - (s1) + (s2)) - 2 * (s3));  \
 
-#define COL_OP(a, b)  a = b
+#define COL_OP(a, b)  a = (b)
 #define ROW_OP(a, b)  a = ((b) + 0x20) >> 6
 
 static void tscc2_idct4_put(int *in, int q[3], uint8_t *dst, int stride)