diff --git a/third_party/gpus/find_cuda_config.py b/third_party/gpus/find_cuda_config.py
index faabd827def..90265f60773 100644
--- a/third_party/gpus/find_cuda_config.py
+++ b/third_party/gpus/find_cuda_config.py
@@ -116,7 +116,7 @@ def _at_least_version(actual_version, required_version):
 def _get_header_version(path, name):
   """Returns preprocessor defines in C header file."""
   for line in open(path, "r").readlines():
-    match = re.match("#define %s (\d+)" % name, line)
+    match = re.match("#define %s +(\d+)" % name, line)
     if match:
       return match.group(1)
   return ""