diff --git a/sgminer.c b/sgminer.c
index 5f2d7b43..5622df49 100644
--- a/sgminer.c
+++ b/sgminer.c
@@ -2306,7 +2306,7 @@ static void suffix_string(uint64_t val, char *buf, size_t bufsiz, int sigdigits)
 static void suffix_string_double(double val, char *buf, size_t bufsiz, int sigdigits)
 {
   if (val < 10) {
-    snprintf(buf, bufsiz, "%.3lf", val);
+    snprintf(buf, bufsiz, "%.3f", val);
   } else {
     return suffix_string(val, buf, bufsiz, sigdigits);
   }