diff --git a/renderdoc/os/posix/posix_stringio.cpp b/renderdoc/os/posix/posix_stringio.cpp
index f29cdc38a..8fbf0d457 100644
--- a/renderdoc/os/posix/posix_stringio.cpp
+++ b/renderdoc/os/posix/posix_stringio.cpp
@@ -370,7 +370,7 @@ int fclose(FILE *f)
 
 void *logfile_open(const char *filename)
 {
-  int fd = open(filename, O_APPEND | O_WRONLY | O_CREAT, S_IWRITE);
+  int fd = open(filename, O_APPEND | O_WRONLY | O_CREAT, S_IWUSR);
   return (void *)(intptr_t)fd;
 }