diff --git a/scripts/make_fit.py b/scripts/make_fit.py
index 15ba26974fd7..9bd35aa72119 100755
--- a/scripts/make_fit.py
+++ b/scripts/make_fit.py
@@ -292,7 +292,8 @@ def process_dtb(fname, args):
 
         if 'scripts/dtc/fdtoverlay' in cmd:
             # This depends on the structure of the composite DTB command
-            files = cmd.split()
+            # Ignore any subsequent commands, such as schema validation
+            files = cmd.split(';', 1)[0].split()
             files = files[files.index('-i') + 1:]
         else:
             files = [fname]