diff --git a/src/util-mpm-ac-gfbs.c b/src/util-mpm-ac-gfbs.c
index 6a3d3bdc80..81ecfcace1 100644
--- a/src/util-mpm-ac-gfbs.c
+++ b/src/util-mpm-ac-gfbs.c
@@ -1412,6 +1412,8 @@ uint32_t SCACGfbsSearch(MpmCtx *mpm_ctx, MpmThreadCtx *mpm_thread_ctx,
                 uint32_t k = 0;
                 for (k = 0; k < no_of_pid_entries; k++) {
                     if (pids[k] & 0xFFFF0000) {
+                        if ((i + 1) < pid_pat_list[pids[k] & 0x0000FFFF].patlen)
+                            continue;
                         if (SCMemcmp(pid_pat_list[pids[k] & 0x0000FFFF].cs,
                                      buf + i - pid_pat_list[pids[k] & 0x0000FFFF].patlen + 1,
                                      pid_pat_list[pids[k] & 0x0000FFFF].patlen) != 0) {
@@ -1539,6 +1541,8 @@ uint32_t SCACGfbsSearch(MpmCtx *mpm_ctx, MpmThreadCtx *mpm_thread_ctx,
                 uint32_t k = 0;
                 for (k = 0; k < no_of_pid_entries; k++) {
                     if (pids[k] & 0xFFFF0000) {
+                        if ((i + 1) < pid_pat_list[pids[k] & 0x0000FFFF].patlen)
+                            continue;
                         if (SCMemcmp(pid_pat_list[pids[k] & 0x0000FFFF].cs,
                                      buf + i - pid_pat_list[pids[k] & 0x0000FFFF].patlen + 1,
                                      pid_pat_list[pids[k] & 0x0000FFFF].patlen) != 0) {