diff --git a/src/V3Width.cpp b/src/V3Width.cpp
index 03ab99ef8..c51266700 100644
--- a/src/V3Width.cpp
+++ b/src/V3Width.cpp
@@ -2096,7 +2096,7 @@ private:
 	if (m_vup->prelim()) {
 	    userIterateAndNext(nodep->searchp(), WidthVP(SELF,BOTH).p());
 	    userIterateAndNext(nodep->outp(), WidthVP(SELF,BOTH).p());
-	    nodep->dtypeSetSigned32();  // Spec says integer return
+	    nodep->dtypeChgWidthSigned(32,1,AstNumeric::SIGNED);  // Spec says integer return
 	}
     }
     virtual void visit(AstUCStmt* nodep) {
diff --git a/test_regress/t/t_sys_plusargs.v b/test_regress/t/t_sys_plusargs.v
index 8c280f951..f0956f3fb 100644
--- a/test_regress/t/t_sys_plusargs.v
+++ b/test_regress/t/t_sys_plusargs.v
@@ -22,13 +22,17 @@ module t;
       if ($value$plusargs("NOTTHERE%d", p_i)!==0) $stop;
       if (p_i !== 10) $stop;
 
+      p_i = 0;
       if ($value$plusargs("INT=%d", p_i)!==1) $stop;
       if (p_i !== 32'd1234) $stop;
 
+      p_i = 0;
       if ($value$plusargs("INT=%H", p_i)!==1) $stop;  // tests uppercase % also
       if (p_i !== 32'h1234) $stop;
 
-      if ($value$plusargs("INT=%o", p_i)!==1) $stop;
+      p_i = 0;
+      // Check octal and WIDTH
+      if (!$value$plusargs("INT=%o", p_i)) $stop;
       if (p_i !== 32'o1234) $stop;
 
       p_str = "none";