diff --git a/src/util.c b/src/util.c
index 6a65bba..24be0e7 100644
--- a/src/util.c
+++ b/src/util.c
@@ -63,7 +63,7 @@ char *cropstr(const char *from, int s) {
 
 
 float formatsize(int64_t from, const char **unit) {
-  float r = from;
+  float r = (float)from;
   if (si) {
     if(r < 1000.0f)   { *unit = " B"; }
     else if(r < 1e6f) { *unit = "KB"; r/=1e3f; }