diff --git a/app/consapp/rnx2rtkp/rnx2rtkp.c b/app/consapp/rnx2rtkp/rnx2rtkp.c
index 54fe48a48..cbaca7d86 100644
--- a/app/consapp/rnx2rtkp/rnx2rtkp.c
+++ b/app/consapp/rnx2rtkp/rnx2rtkp.c
@@ -136,12 +136,12 @@ int main(int argc, char **argv)
         else if (!strcmp(argv[i],"-sys")&&i+1<argc) {
             for (p=argv[++i];*p;p++) {
                 switch (*p) {
-                    case 'G': prcopt.navsys|=SYS_GPS;
-                    case 'R': prcopt.navsys|=SYS_GLO;
-                    case 'E': prcopt.navsys|=SYS_GAL;
-                    case 'J': prcopt.navsys|=SYS_QZS;
-                    case 'C': prcopt.navsys|=SYS_CMP;
-                    case 'I': prcopt.navsys|=SYS_IRN;
+                    case 'G': prcopt.navsys|=SYS_GPS;   break;
+                    case 'R': prcopt.navsys|=SYS_GLO;   break;
+                    case 'E': prcopt.navsys|=SYS_GAL;   break;
+                    case 'J': prcopt.navsys|=SYS_QZS;   break;
+                    case 'C': prcopt.navsys|=SYS_CMP;   break;
+                    case 'I': prcopt.navsys|=SYS_IRN;   break;
                 }
                 if (!(p=strchr(p,','))) break;
             }