diff --git a/src/Desc.cc b/src/Desc.cc
index 1d76c32e55..b64bcec8d8 100644
--- a/src/Desc.cc
+++ b/src/Desc.cc
@@ -145,7 +145,9 @@ void ODesc::Add(double d, bool no_exp)
 		AddBytes(&d, sizeof(d));
 	else
 		{
-		char tmp[256];
+		// Buffer needs enough chars to store max. possible "double" value
+		// of 1.79e308 without using scientific notation.
+		char tmp[350];
 
 		if ( no_exp )
 			modp_dtoa3(d, tmp, sizeof(tmp), IsReadable() ? 6 : 8);
diff --git a/testing/btest/Baseline/scripts.base.frameworks.logging.ascii-double/test.log b/testing/btest/Baseline/scripts.base.frameworks.logging.ascii-double/test.log
index 45f8783c7b..9d5dd6ecf0 100644
--- a/testing/btest/Baseline/scripts.base.frameworks.logging.ascii-double/test.log
+++ b/testing/btest/Baseline/scripts.base.frameworks.logging.ascii-double/test.log
@@ -3,7 +3,7 @@
 #empty_field	(empty)
 #unset_field	-
 #path	test
-#open	2017-11-02-21-00-25
+#open	2017-11-06-19-58-08
 #fields	d
 #types	double
 2153226000.0
@@ -19,8 +19,8 @@
 -50000.0
 3140000000000000.0
 -3140000000000000.0
-NAN.0
-NAN.0
+178999999999999996376899522972626047077637637819240219954027593177370961667659291027329061638406108931437333529420935752785895444161234074984843178962619172326295244262722141766382622299223626438470088150218987997954747866198184686628013966119769261150988554952970462018533787926725176560021258785656871583744.0
+-178999999999999996376899522972626047077637637819240219954027593177370961667659291027329061638406108931437333529420935752785895444161234074984843178962619172326295244262722141766382622299223626438470088150218987997954747866198184686628013966119769261150988554952970462018533787926725176560021258785656871583744.0
 0.000012
 0
 -0
@@ -28,4 +28,4 @@ inf
 -inf
 0.0
 nan
-#close	2017-11-02-21-00-25
+#close	2017-11-06-19-58-08