diff --git a/libavcodec/cscd.c b/libavcodec/cscd.c
index 55bf2ec128..9379b2c7f3 100644
--- a/libavcodec/cscd.c
+++ b/libavcodec/cscd.c
@@ -158,7 +158,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
     switch ((buf[0] >> 1) & 7) {
         case 0: { // lzo compression
             int outlen = c->decomp_size, inlen = buf_size - 2;
-            if (lzo1x_decode(c->decomp_buf, &outlen, &buf[2], &inlen))
+            if (av_lzo1x_decode(c->decomp_buf, &outlen, &buf[2], &inlen))
                 av_log(avctx, AV_LOG_ERROR, "error during lzo decompression\n");
             break;
         }
@@ -232,7 +232,7 @@ static av_cold int decode_init(AVCodecContext *avctx) {
     c->linelen = avctx->width * avctx->bits_per_coded_sample / 8;
     c->height = avctx->height;
     c->decomp_size = c->height * c->linelen;
-    c->decomp_buf = av_malloc(c->decomp_size + LZO_OUTPUT_PADDING);
+    c->decomp_buf = av_malloc(c->decomp_size + AV_LZO_OUTPUT_PADDING);
     if (!c->decomp_buf) {
         av_log(avctx, AV_LOG_ERROR, "Can't allocate decompression buffer.\n");
         return 1;
diff --git a/libavcodec/nuv.c b/libavcodec/nuv.c
index 7f6e5d336e..08f4b79b95 100644
--- a/libavcodec/nuv.c
+++ b/libavcodec/nuv.c
@@ -116,7 +116,7 @@ static int codec_reinit(AVCodecContext *avctx, int width, int height, int qualit
         avctx->width = c->width = width;
         avctx->height = c->height = height;
         c->decomp_size = c->height * c->width * 3 / 2;
-        c->decomp_buf = av_realloc(c->decomp_buf, c->decomp_size + LZO_OUTPUT_PADDING);
+        c->decomp_buf = av_realloc(c->decomp_buf, c->decomp_size + AV_LZO_OUTPUT_PADDING);
         if (!c->decomp_buf) {
             av_log(avctx, AV_LOG_ERROR, "Can't allocate decompression buffer.\n");
             return 0;
@@ -175,7 +175,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
     buf_size -= 12;
     if (comptype == NUV_RTJPEG_IN_LZO || comptype == NUV_LZO) {
         int outlen = c->decomp_size, inlen = buf_size;
-        if (lzo1x_decode(c->decomp_buf, &outlen, buf, &inlen))
+        if (av_lzo1x_decode(c->decomp_buf, &outlen, buf, &inlen))
             av_log(avctx, AV_LOG_ERROR, "error during lzo decompression\n");
         buf = c->decomp_buf;
         buf_size = c->decomp_size;
diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
index 7751db88eb..d52d2fa5a1 100644
--- a/libavformat/matroskadec.c
+++ b/libavformat/matroskadec.c
@@ -872,9 +872,9 @@ static int matroska_decode_buffer(uint8_t** buf, int* buf_size,
         do {
             olen = pkt_size *= 3;
             pkt_data = av_realloc(pkt_data,
-                                  pkt_size+LZO_OUTPUT_PADDING);
-            result = lzo1x_decode(pkt_data, &olen, data, &isize);
-        } while (result==LZO_OUTPUT_FULL && pkt_size<10000000);
+                                  pkt_size+AV_LZO_OUTPUT_PADDING);
+            result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
+        } while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);
         if (result)
             goto failed;
         pkt_size -= olen;
diff --git a/libavutil/lzo.c b/libavutil/lzo.c
index c555774194..637c0d7038 100644
--- a/libavutil/lzo.c
+++ b/libavutil/lzo.c
@@ -41,7 +41,7 @@ typedef struct LZOContext {
 static inline int get_byte(LZOContext *c) {
     if (c->in < c->in_end)
         return *c->in++;
-    c->error |= LZO_INPUT_DEPLETED;
+    c->error |= AV_LZO_INPUT_DEPLETED;
     return 1;
 }
 
@@ -88,11 +88,11 @@ static inline void copy(LZOContext *c, int cnt) {
     register uint8_t *dst = c->out;
     if (cnt > c->in_end - src) {
         cnt = FFMAX(c->in_end - src, 0);
-        c->error |= LZO_INPUT_DEPLETED;
+        c->error |= AV_LZO_INPUT_DEPLETED;
     }
     if (cnt > c->out_end - dst) {
         cnt = FFMAX(c->out_end - dst, 0);
-        c->error |= LZO_OUTPUT_FULL;
+        c->error |= AV_LZO_OUTPUT_FULL;
     }
 #if defined(INBUF_PADDED) && defined(OUTBUF_PADDED)
     COPY4(dst, src);
@@ -120,12 +120,12 @@ static inline void copy_backptr(LZOContext *c, int back, int cnt) {
     register const uint8_t *src = &c->out[-back];
     register uint8_t *dst = c->out;
     if (src < c->out_start || src > dst) {
-        c->error |= LZO_INVALID_BACKPTR;
+        c->error |= AV_LZO_INVALID_BACKPTR;
         return;
     }
     if (cnt > c->out_end - dst) {
         cnt = FFMAX(c->out_end - dst, 0);
-        c->error |= LZO_OUTPUT_FULL;
+        c->error |= AV_LZO_OUTPUT_FULL;
     }
     memcpy_backptr(dst, back, cnt);
     c->out = dst + cnt;
@@ -187,9 +187,9 @@ void av_memcpy_backptr(uint8_t *dst, int back, int cnt) {
  * \return 0 on success, otherwise error flags, see lzo.h
  *
  * Make sure all buffers are appropriately padded, in must provide
- * LZO_INPUT_PADDING, out must provide LZO_OUTPUT_PADDING additional bytes.
+ * AV_LZO_INPUT_PADDING, out must provide AV_LZO_OUTPUT_PADDING additional bytes.
  */
-int lzo1x_decode(void *out, int *outlen, const void *in, int *inlen) {
+int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen) {
     int state= 0;
     int x;
     LZOContext c;
@@ -202,10 +202,10 @@ int lzo1x_decode(void *out, int *outlen, const void *in, int *inlen) {
     if (x > 17) {
         copy(&c, x - 17);
         x = GETB(c);
-        if (x < 16) c.error |= LZO_ERROR;
+        if (x < 16) c.error |= AV_LZO_ERROR;
     }
     if (c.in > c.in_end)
-        c.error |= LZO_INPUT_DEPLETED;
+        c.error |= AV_LZO_INPUT_DEPLETED;
     while (!c.error) {
         int cnt, back;
         if (x > 15) {
@@ -223,7 +223,7 @@ int lzo1x_decode(void *out, int *outlen, const void *in, int *inlen) {
                 back += (GETB(c) << 6) + (x >> 2);
                 if (back == (1 << 14)) {
                     if (cnt != 1)
-                        c.error |= LZO_ERROR;
+                        c.error |= AV_LZO_ERROR;
                     break;
                 }
             }
@@ -252,6 +252,12 @@ int lzo1x_decode(void *out, int *outlen, const void *in, int *inlen) {
     return c.error;
 }
 
+#if LIBAVUTIL_VERSION_MAJOR < 50
+int lzo1x_decode(void *out, int *outlen, const void *in, int *inlen) {
+    return av_lzo1x_decode(out, outlen, in, inlen);
+}
+#endif
+
 #ifdef TEST
 #include <stdio.h>
 #include <lzo/lzo1x.h>
@@ -277,7 +283,7 @@ START_TIMER
 #elif defined(LIBLZO_UNSAFE)
         if (lzo1x_decompress(comp, inlen, decomp, &outlen, NULL))
 #else
-        if (lzo1x_decode(decomp, &outlen, comp, &inlen))
+        if (av_lzo1x_decode(decomp, &outlen, comp, &inlen))
 #endif
             av_log(NULL, AV_LOG_ERROR, "decompression error\n");
 STOP_TIMER("lzod")
diff --git a/libavutil/lzo.h b/libavutil/lzo.h
index 2f09f9f217..f1c1ce99b4 100644
--- a/libavutil/lzo.h
+++ b/libavutil/lzo.h
@@ -24,15 +24,15 @@
 
 #include <stdint.h>
 
-#define LZO_INPUT_DEPLETED 1
-#define LZO_OUTPUT_FULL 2
-#define LZO_INVALID_BACKPTR 4
-#define LZO_ERROR 8
+#define AV_LZO_INPUT_DEPLETED 1
+#define AV_LZO_OUTPUT_FULL 2
+#define AV_LZO_INVALID_BACKPTR 4
+#define AV_LZO_ERROR 8
 
-#define LZO_INPUT_PADDING 8
-#define LZO_OUTPUT_PADDING 12
+#define AV_LZO_INPUT_PADDING 8
+#define AV_LZO_OUTPUT_PADDING 12
 
-int lzo1x_decode(void *out, int *outlen, const void *in, int *inlen);
+int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen);
 
 void av_memcpy_backptr(uint8_t *dst, int back, int cnt);