diff --git a/decoder/ixheaacd_defines.h b/decoder/ixheaacd_defines.h
index 3ff42dd..d631473 100644
--- a/decoder/ixheaacd_defines.h
+++ b/decoder/ixheaacd_defines.h
@@ -28,6 +28,7 @@
 #define MAX_BINS_LONG 1024
 #define MAX_BINS_SHORT 128
 #define MAX_SCALE_FACTOR_BANDS_SHORT 16
+#define MAX_SCALE_FACTOR_BANDS_LONG (52)
 
 #define ZERO_HCB 0
 
diff --git a/decoder/ixheaacd_longblock.c b/decoder/ixheaacd_longblock.c
index 18a62ec..e5582f7 100644
--- a/decoder/ixheaacd_longblock.c
+++ b/decoder/ixheaacd_longblock.c
@@ -113,10 +113,11 @@ WORD16 ixheaacd_read_section_data(
         sect_len_incr = 1;
 
       sect_len = (sect_len + sect_len_incr);
-      top = (sfb + sect_len);
 
       if (aac_spect_data_resil_flag) {
-        if (num_lines_sec_idx >= MAX_SFB_HCR) {
+        top = (sfb + sect_len);
+        if ((num_lines_sec_idx >= MAX_SFB_HCR) ||
+            (top >= MAX_SCALE_FACTOR_BANDS_LONG)) {
           return -1;
         }
         ptr_num_sect_lines[num_lines_sec_idx] =