diff --git a/lib/msun/ld128/s_expl.c b/lib/msun/ld128/s_expl.c
index c8b7550a282d..5052c3afca67 100644
--- a/lib/msun/ld128/s_expl.c
+++ b/lib/msun/ld128/s_expl.c
@@ -211,19 +211,16 @@ expl(long double x)
 	ix = hx & 0x7fff;
 	if (ix >= BIAS + 13) {		/* |x| >= 8192 or x is NaN */
 		if (ix == BIAS + LDBL_MAX_EXP) {
-			if (u.xbits.manh != 0
-			    || u.xbits.manl != 0
-			    || (hx & 0x8000) == 0)
-				return (x + x);	/* x is NaN or +Inf */
-			else 
-				return (0.0);	/* x is -Inf */
+			if (hx & 0x8000 && u.xbits.manh == 0 &&
+			    u.xbits.manl == 0)
+				return (0.0L);	/* x is -Inf */
+			return (x + x);	/* x is +Inf or NaN */
 		}
 		if (x > o_threshold)
 			return (huge * huge);
 		if (x < u_threshold)
 			return (tiny * tiny);
-	} else if (ix <= BIAS - 115) {	/* |x| < 0x1p-33 */
-					/* includes pseudo-denormals */
+	} else if (ix < BIAS - 115) {	/* |x| < 0x1p-115 */
 	    	if (huge + x > 1.0L)	/* trigger inexact iff x != 0 */
 			return (1.0L + x);
 	}
diff --git a/lib/msun/ld80/s_expl.c b/lib/msun/ld80/s_expl.c
index b9cf4aee4344..dfd49e5f7cdb 100644
--- a/lib/msun/ld80/s_expl.c
+++ b/lib/msun/ld80/s_expl.c
@@ -249,7 +249,7 @@ expl(long double x)
 			return (huge * huge);
 		if (x < u_threshold.e)
 			return (tiny * tiny);
-	} else if (ix <= BIAS - 34) {	/* |x| < 0x1p-33 */
+	} else if (ix < BIAS - 66) {	/* |x| < 0x1p-66 */
 					/* includes pseudo-denormals */
 		if (huge + x > 1.0L)	/* trigger inexact iff x != 0 */
 			return (1.0L + x);