diff --git a/src/util-mpm-hs.c b/src/util-mpm-hs.c
index eca73f7cba..194a7bbd78 100644
--- a/src/util-mpm-hs.c
+++ b/src/util-mpm-hs.c
@@ -313,6 +313,17 @@ static int SCHSAddPattern(MpmCtx *mpm_ctx, uint8_t *pat, uint16_t patlen,
 
         mpm_ctx->pattern_cnt++;
 
+        if (!(mpm_ctx->flags & MPMCTX_FLAGS_NODEPTH)) {
+            if (depth) {
+                mpm_ctx->maxdepth = MAX(mpm_ctx->maxdepth, depth);
+                SCLogDebug("%p: depth %u max %u", mpm_ctx, depth, mpm_ctx->maxdepth);
+            } else {
+                mpm_ctx->flags |= MPMCTX_FLAGS_NODEPTH;
+                mpm_ctx->maxdepth = 0;
+                SCLogDebug("%p: alas, no depth for us", mpm_ctx);
+            }
+        }
+
         if (mpm_ctx->maxlen < patlen)
             mpm_ctx->maxlen = patlen;