diff --git a/libavutil/aarch64/bswap.h b/libavutil/aarch64/bswap.h
index 1e735c52cf..7abca657ba 100644
--- a/libavutil/aarch64/bswap.h
+++ b/libavutil/aarch64/bswap.h
@@ -28,22 +28,28 @@
 #define av_bswap16 av_bswap16
 static av_always_inline av_const unsigned av_bswap16(unsigned x)
 {
-    __asm__("rev16 %w0, %w0" : "+r"(x));
-    return x;
+    unsigned y;
+
+    __asm__("rev16 %w0, %w1" : "=r"(y) : "r"(x));
+    return y;
 }
 
 #define av_bswap32 av_bswap32
 static av_always_inline av_const uint32_t av_bswap32(uint32_t x)
 {
-    __asm__("rev %w0, %w0" : "+r"(x));
-    return x;
+    uint32_t y;
+
+    __asm__("rev %w0, %w1" : "=r"(y) : "r"(x));
+    return y;
 }
 
 #define av_bswap64 av_bswap64
 static av_always_inline av_const uint64_t av_bswap64(uint64_t x)
 {
-    __asm__("rev %0, %0" : "+r"(x));
-    return x;
+    uint64_t y;
+
+    __asm__("rev %0, %1" : "=r"(y) : "r"(x));
+    return y;
 }
 
 #endif /* HAVE_INLINE_ASM */