diff --git a/libSACdec/src/sac_bitdec.cpp b/libSACdec/src/sac_bitdec.cpp
index da5b262..1049c3d 100644
--- a/libSACdec/src/sac_bitdec.cpp
+++ b/libSACdec/src/sac_bitdec.cpp
@@ -1870,6 +1870,16 @@
     frame->numParameterSets =
         fixMin(MAX_PARAMETER_SETS, frame->numParameterSets + 1);
     frame->paramSlot[frame->numParameterSets - 1] = self->timeSlots - 1;
+
+    for (int p = 0; p < frame->numParameterSets; p++) {
+      if (frame->paramSlot[p] > self->timeSlots - 1) {
+        frame->paramSlot[p] = self->timeSlots - 1;
+        err = MPS_PARSE_ERROR;
+      }
+    }
+    if (err != MPS_OK) {
+      goto bail;
+    }
   }
 
 bail: