diff --git a/rdswitch.c b/rdswitch.c
index c50c33e7..886fec39 100644
--- a/rdswitch.c
+++ b/rdswitch.c
@@ -338,8 +338,8 @@ set_quality_ratings(j_compress_ptr cinfo, char *arg, boolean force_baseline)
 #else
       q_scale_factor[tblno] = jpeg_quality_scaling(val);
 #endif
-      while (*arg && *arg++ != ',') /* advance to next segment of arg string */
-        ;
+      while (*arg && *arg++ != ','); /* advance to next segment of arg
+                                        string */
     } else {
       /* reached end of parameter, set remaining factors to last value */
 #if JPEG_LIB_VERSION >= 70
@@ -378,8 +378,8 @@ set_quant_slots(j_compress_ptr cinfo, char *arg)
         return FALSE;
       }
       cinfo->comp_info[ci].quant_tbl_no = val;
-      while (*arg && *arg++ != ',') /* advance to next segment of arg string */
-        ;
+      while (*arg && *arg++ != ','); /* advance to next segment of arg
+                                        string */
     } else {
       /* reached end of parameter, set remaining components to last table */
       cinfo->comp_info[ci].quant_tbl_no = val;
@@ -412,8 +412,8 @@ set_sample_factors(j_compress_ptr cinfo, char *arg)
       }
       cinfo->comp_info[ci].h_samp_factor = val1;
       cinfo->comp_info[ci].v_samp_factor = val2;
-      while (*arg && *arg++ != ',') /* advance to next segment of arg string */
-        ;
+      while (*arg && *arg++ != ',');  /* advance to next segment of arg
+                                         string */
     } else {
       /* reached end of parameter, set remaining components to 1x1 sampling */
       cinfo->comp_info[ci].h_samp_factor = 1;