diff --git a/src/V3PreLex.l b/src/V3PreLex.l
index 0bc98d50f..408714bf3 100644
--- a/src/V3PreLex.l
+++ b/src/V3PreLex.l
@@ -321,8 +321,8 @@ size_t V3PreLex::inputToLex(char* buf, size_t max_size) {
     //
     VPreStream* streamp = curStreamp();
     if (debug()>=10) {
-	cout<<"-  pp:inputToLex ITL s="<<max_size<<" bs="<<streamp->m_buffers.size()<<endl;
-	dumpStack();
+        cout<<"-  pp:inputToLex ITL s="<<max_size<<" bs="<<streamp->m_buffers.size()<<endl;
+        dumpStack();
     }
     // For testing, use really small chunks
     //if (max_size > 13) max_size=13;
@@ -369,7 +369,7 @@ string V3PreLex::endOfStream(bool& againr) {
     // Switch to file or next unputString
     againr = false;
     if (yy_flex_debug) {
-	cout<<"-EOS state="<<curStreamp()->m_termState<<" at "<<curFilelinep()<<endl;
+        cout<<"-EOS state="<<curStreamp()->m_termState<<" at "<<curFilelinep()<<endl;
     }
     if (curStreamp()->m_eof) return "";  // Don't delete the final "EOF" stream
     bool exited_file = curStreamp()->m_file;
diff --git a/src/verilog.l b/src/verilog.l
index 1f3a1c2a7..df52290d5 100644
--- a/src/verilog.l
+++ b/src/verilog.l
@@ -1023,7 +1023,7 @@ void V3ParseImp::lexToken() {
             SYMP->nextId(NULL);
         } else {
             UINFO(7,"   lexToken: find upward "<<SYMP->symCurrentp()
-		  <<" for '"<<*(yylval.strp)<<"'"<<endl);
+                  <<" for '"<<*(yylval.strp)<<"'"<<endl);
             //if (debug()>=9) SYMP->symCurrentp()->dump(cout,"     -findtree: ", true);
             foundp = SYMP->symCurrentp()->findIdFallback(*(yylval.strp));
         }
@@ -1057,8 +1057,8 @@ int V3ParseImp::lexToBison() {
         cout<<"   {"<<yylval.fl->filenameLetters()<<yylval.fl->lineno()
             <<"} lexToBison  TOKEN="<<yylval.token<<" "<<tokenName(yylval.token);
         if (yylval.token == yaID__ETC
-	    || yylval.token == yaID__LEX
-	    || yylval.token == yaID__aTYPE) {
+            || yylval.token == yaID__LEX
+            || yylval.token == yaID__aTYPE) {
             cout<<"   strp='"<<*(yylval.strp)<<"'";
         }
         cout<<endl;