diff --git a/kernel/rtlil.h b/kernel/rtlil.h
index f53d9df8c..ef33ab2d7 100644
--- a/kernel/rtlil.h
+++ b/kernel/rtlil.h
@@ -308,7 +308,7 @@ namespace RTLIL
 		bool operator!=(const char *rhs) const { return strcmp(c_str(), rhs) != 0; }
 
 		char operator[](size_t i) const {
-                  const char *p = c_str();
+                        const char *p = c_str();
 #ifndef NDEBUG
 			for (; i != 0; i--, p++)
 				log_assert(*p != 0);