diff --git a/first_diff.py b/first_diff.py
index fff96557a1..3b8a9dd46a 100755
--- a/first_diff.py
+++ b/first_diff.py
@@ -93,7 +93,7 @@ def search_rom_address(target_addr):
             rom = ram - ram_offset 
             sym = line.split()[-1]
     
-            if "0x" in sym:
+            if sym.startswith("0x"):
                 ram_offset = None
                 continue
             if "/" in sym:
@@ -139,7 +139,7 @@ def parse_map(map_fname):
             rom = ram - ram_offset
             sym = line.split()[-1]
 
-            if "0x" in sym:
+            if sym.startswith("0x"):
                 ram_offset = None
                 continue
             elif "/" in sym:
diff --git a/sym_info.py b/sym_info.py
index ae70bf0501..ed37d6ce29 100755
--- a/sym_info.py
+++ b/sym_info.py
@@ -64,8 +64,8 @@ def search_address(target_addr):
             ram = int(line[16 : 16 + 18], 0)
             rom = ram - ram_offset 
             sym = line.split()[-1]
-    
-            if "0x" in sym:
+
+            if sym.startswith("0x"):
                 ram_offset = None
                 continue
             if "/" in sym:
@@ -112,7 +112,7 @@ def search_symbol(target_sym):
             rom = ram - ram_offset
             sym = line.split()[-1]
 
-            if "0x" in sym:
+            if sym.startswith("0x"):
                 ram_offset = None
                 continue
             elif "/" in sym: