diff --git a/apps/plugins/lua/fscanf.c b/apps/plugins/lua/fscanf.c
index 25058af7da..9f5f129d3c 100644
--- a/apps/plugins/lua/fscanf.c
+++ b/apps/plugins/lua/fscanf.c
@@ -266,7 +266,7 @@ static int scan(int (*peek)(void *userp),
 
 static int fspeek(void *userp)
 {
-    int fd = (int) userp;
+    int fd = *((int*) userp);
     char buf = 0;
     if(rb->read(fd, &buf, 1) == 1)
         rb->lseek(fd, -1, SEEK_CUR);
@@ -275,7 +275,8 @@ static int fspeek(void *userp)
 
 static void fspop(void *userp)
 {
-    rb->lseek((int) userp, 1, SEEK_CUR);
+    int fd = *((int*) userp);
+    rb->lseek(fd, 1, SEEK_CUR);
 }
 
 int PREFIX(fscanf)(int fd, const char *fmt, ...)
@@ -284,7 +285,7 @@ int PREFIX(fscanf)(int fd, const char *fmt, ...)
     va_list ap;
 
     va_start(ap, fmt);
-    r = scan(fspeek, fspop, (void*) fd, fmt, ap);
+    r = scan(fspeek, fspop, &fd, fmt, ap);
     va_end(ap);
     return r;
 }