diff --git a/src/detect-flowbits.c b/src/detect-flowbits.c
index 315cb8cfc9..bb95c95cd6 100644
--- a/src/detect-flowbits.c
+++ b/src/detect-flowbits.c
@@ -260,9 +260,7 @@ int DetectFlowbitSetup (DetectEngineCtx *de_ctx, Signature *s, char *rawstr)
     sm->ctx = (SigMatchCtx *)cd;
 
     switch (fb_cmd) {
-        case DETECT_FLOWBITS_CMD_NOALERT:
-            /* nothing to do */
-            break;
+        /* case DETECT_FLOWBITS_CMD_NOALERT can't happen here */
 
         case DETECT_FLOWBITS_CMD_ISNOTSET:
         case DETECT_FLOWBITS_CMD_ISSET:
diff --git a/src/detect-hostbits.c b/src/detect-hostbits.c
index a940897b9a..a69c292f12 100644
--- a/src/detect-hostbits.c
+++ b/src/detect-hostbits.c
@@ -403,9 +403,7 @@ int DetectHostbitSetup (DetectEngineCtx *de_ctx, Signature *s, char *rawstr)
     sm->ctx = (void *)cd;
 
     switch (fb_cmd) {
-        case DETECT_XBITS_CMD_NOALERT:
-            /* nothing to do */
-            break;
+        /* case DETECT_XBITS_CMD_NOALERT can't happen here */
 
         case DETECT_XBITS_CMD_ISNOTSET:
         case DETECT_XBITS_CMD_ISSET:
diff --git a/src/detect-xbits.c b/src/detect-xbits.c
index 09a85a5c73..876ddc36df 100644
--- a/src/detect-xbits.c
+++ b/src/detect-xbits.c
@@ -327,9 +327,7 @@ int DetectXbitSetup (DetectEngineCtx *de_ctx, Signature *s, char *rawstr)
     sm->ctx = (void *)cd;
 
     switch (fb_cmd) {
-        case DETECT_XBITS_CMD_NOALERT:
-            /* nothing to do */
-            break;
+        /* case DETECT_XBITS_CMD_NOALERT can't happen here */
 
         case DETECT_XBITS_CMD_ISNOTSET:
         case DETECT_XBITS_CMD_ISSET: