diff --git a/libavutil/intreadwrite.h b/libavutil/intreadwrite.h
index 51fbe30a23..89d25ac170 100644
--- a/libavutil/intreadwrite.h
+++ b/libavutil/intreadwrite.h
@@ -242,8 +242,8 @@ union unaligned_16 { uint16_t l; } __attribute__((packed)) av_alias;
       ((const uint8_t*)(x))[1])
 #endif
 #ifndef AV_WB16
-#   define AV_WB16(p, darg) do {                \
-        unsigned d = (darg);                    \
+#   define AV_WB16(p, val) do {                 \
+        uint16_t d = (val);                     \
         ((uint8_t*)(p))[1] = (d);               \
         ((uint8_t*)(p))[0] = (d)>>8;            \
     } while(0)
@@ -255,8 +255,8 @@ union unaligned_16 { uint16_t l; } __attribute__((packed)) av_alias;
       ((const uint8_t*)(x))[0])
 #endif
 #ifndef AV_WL16
-#   define AV_WL16(p, darg) do {                \
-        unsigned d = (darg);                    \
+#   define AV_WL16(p, val) do {                 \
+        uint16_t d = (val);                     \
         ((uint8_t*)(p))[0] = (d);               \
         ((uint8_t*)(p))[1] = (d)>>8;            \
     } while(0)
@@ -270,8 +270,8 @@ union unaligned_16 { uint16_t l; } __attribute__((packed)) av_alias;
                 ((const uint8_t*)(x))[3])
 #endif
 #ifndef AV_WB32
-#   define AV_WB32(p, darg) do {                \
-        unsigned d = (darg);                    \
+#   define AV_WB32(p, val) do {                 \
+        uint32_t d = (val);                     \
         ((uint8_t*)(p))[3] = (d);               \
         ((uint8_t*)(p))[2] = (d)>>8;            \
         ((uint8_t*)(p))[1] = (d)>>16;           \
@@ -287,8 +287,8 @@ union unaligned_16 { uint16_t l; } __attribute__((packed)) av_alias;
                 ((const uint8_t*)(x))[0])
 #endif
 #ifndef AV_WL32
-#   define AV_WL32(p, darg) do {                \
-        unsigned d = (darg);                    \
+#   define AV_WL32(p, val) do {                 \
+        uint32_t d = (val);                     \
         ((uint8_t*)(p))[0] = (d);               \
         ((uint8_t*)(p))[1] = (d)>>8;            \
         ((uint8_t*)(p))[2] = (d)>>16;           \
@@ -308,8 +308,8 @@ union unaligned_16 { uint16_t l; } __attribute__((packed)) av_alias;
       (uint64_t)((const uint8_t*)(x))[7])
 #endif
 #ifndef AV_WB64
-#   define AV_WB64(p, darg) do {                \
-        uint64_t d = (darg);                    \
+#   define AV_WB64(p, val) do {                 \
+        uint64_t d = (val);                     \
         ((uint8_t*)(p))[7] = (d);               \
         ((uint8_t*)(p))[6] = (d)>>8;            \
         ((uint8_t*)(p))[5] = (d)>>16;           \
@@ -333,8 +333,8 @@ union unaligned_16 { uint16_t l; } __attribute__((packed)) av_alias;
       (uint64_t)((const uint8_t*)(x))[0])
 #endif
 #ifndef AV_WL64
-#   define AV_WL64(p, darg) do {                \
-        uint64_t d = (darg);                    \
+#   define AV_WL64(p, val) do {                 \
+        uint64_t d = (val);                     \
         ((uint8_t*)(p))[0] = (d);               \
         ((uint8_t*)(p))[1] = (d)>>8;            \
         ((uint8_t*)(p))[2] = (d)>>16;           \