diff --git a/Changes b/Changes
index e6d60ea1a..89af2fa73 100644
--- a/Changes
+++ b/Changes
@@ -11,6 +11,8 @@ indicates the contributor was also the author of the fix; Thanks!
 
 ****  Fix evaluation of chained parameter functions, bug684. [Ted Campbell]
 
+****  Fix enum value extension of '1.
+
 ****  Fix multiple VPI variable callbacks, bug679. [Rich Porter]
 
 ****  Fix vpi_get of vpiSize, bug680. [Rich Porter]
diff --git a/src/V3Width.cpp b/src/V3Width.cpp
index a91df6186..dccf2ecf7 100644
--- a/src/V3Width.cpp
+++ b/src/V3Width.cpp
@@ -2251,12 +2251,16 @@ private:
     void widthCheck (AstNode* nodep, const char* side,
 		     AstNode* underp, AstNodeDType* expDTypep,
 		     bool ignoreWarn=false) {
-	//UINFO(9,"wchk "<<side<<endl<<"  "<<nodep<<endl<<"  "<<underp<<endl<<"  e"<<expWidth<<" m"<<expWidthMin<<" i"<<ignoreWarn<<endl);
+	//UINFO(9,"wchk "<<side<<endl<<"  "<<nodep<<endl<<"  "<<underp<<endl<<"  e="<<expDTypep<<" i"<<ignoreWarn<<endl);
 	int expWidth = expDTypep->width();
 	int expWidthMin = expDTypep->widthMin();
 	if (expWidthMin==0) expWidthMin = expWidth;
 	bool bad = widthBad(underp,expWidth,expWidthMin);
-	if (bad && fixAutoExtend(underp/*ref*/,expWidth)) bad=false;  // Changes underp
+	if ((bad || underp->width() !=expWidth)
+	    && fixAutoExtend(underp/*ref*/,expWidth)) {
+	    underp=NULL; // Changes underp
+	    return;
+	}
 	if (underp->castConst() && underp->castConst()->num().isFromString()
 	    && expWidth > underp->width()
 	    && (((expWidth - underp->width()) % 8) == 0)) {  // At least it's character sized
diff --git a/test_regress/t/t_enum.v b/test_regress/t/t_enum.v
index 9548fc9a3..1681cb603 100644
--- a/test_regress/t/t_enum.v
+++ b/test_regress/t/t_enum.v
@@ -34,6 +34,9 @@ module t (/*AUTOARG*/);
 
    var logic [ONES:0] sized_based_on_enum;
 
+   var enum logic [3:0]  { QINVALID='1, QSEND={2'b0,2'h0}, QOP={2'b0,2'h1}, QCL={2'b0,2'h2},
+			   QPR={2'b0,2'h3 }, QACK, QRSP } inv;
+
    initial begin
       if (e0 !== 0) $stop;
       if (e1 !== 1) $stop;
@@ -61,6 +64,14 @@ module t (/*AUTOARG*/);
       if (FIVE[BIT1] != 1'b0) $stop;
       if (FIVE[BIT2] != 1'b1) $stop;
 
+      if (QINVALID != 15) $stop;
+      if (QSEND    !=  0) $stop;
+      if (QOP      !=  1) $stop;
+      if (QCL      !=  2) $stop;
+      if (QPR      !=  3) $stop;
+      if (QACK     !=  4) $stop;
+      if (QRSP     !=  5) $stop;
+
       $write("*-* All Finished *-*\n");
       $finish;
    end