--- a/libavutil/file_open.c
+++ b/libavutil/file_open.c
@@ -113,7 +113,7 @@
     FileLogContext file_log_ctx = { &file_log_ctx_class, log_offset, log_ctx };
     int fd = -1;
 #if HAVE_MKSTEMP
-    size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */
+    size_t len = strlen(prefix) + strlen("@TERMUX_PREFIX@/tmp/") + 7; /* room for "@TERMUX_PREFIX@/tmp/" and "XXXXXX\0" */
     *filename  = av_malloc(len);
 #elif HAVE_TEMPNAM
     void *ptr= tempnam(NULL, prefix);
@@ -139,7 +139,7 @@
 #   endif
     fd = open(*filename, O_RDWR | O_BINARY | O_CREAT | O_EXCL, 0600);
 #else
-    snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);
+    snprintf(*filename, len, "@TERMUX_PREFIX@/tmp/%sXXXXXX", prefix);
     fd = mkstemp(*filename);
 #if defined(_WIN32) || defined (__ANDROID__) || defined(__DJGPP__)
     if (fd < 0) {