diff --git a/src/floatfns.c b/src/floatfns.c
index b6bb4044750f56c3a46b2f27a2cda46570b65681..f0bff86a6828c9f798d68ebc5b174a9f2977526b 100644
--- a/src/floatfns.c
+++ b/src/floatfns.c
@@ -302,7 +302,7 @@ DEFUN ("expt", Fexpt, Sexpt, 2, 2, 0,
 }
 
 DEFUN ("log", Flog, Slog, 1, 2, 0,
-  "Return the natural logarithm of NUM.
+  "Return the natural logarithm of NUM.\n\
 If second optional argument BASE is given, return log NUM using that base.")
   (num, base)
      register Lisp_Object num, base;
diff --git a/src/textprop.c b/src/textprop.c
index 7f454656f6a4e7b1710e0346b9281e7531ac3e73..e3eb3e2ae4c45e6393b0ccc703e0169d488ede78 100644
--- a/src/textprop.c
+++ b/src/textprop.c
@@ -424,7 +424,7 @@ Returns nil if unsuccessful.")
 DEFUN ("previous-single-property-change", Fprevious_single_property_change,
        Sprevious_single_property_change, 3, 3, 0,
        "Return the position preceding POSITION in OBJECT which has a\n\
-different value for PROPERTY than the text at POSITION.  OBJECT may be
+different value for PROPERTY than the text at POSITION.  OBJECT may be\n\
 a string or buffer.  Returns nil if unsuccessful.")
      (pos, object, prop)
 {
@@ -788,7 +788,7 @@ void
 syms_of_textprop ()
 {
   DEFVAR_INT ("interval-balance-threshold", &interval_balance_threshold,
-	      "Threshold for rebalancing interval trees, expressed as the
+	      "Threshold for rebalancing interval trees, expressed as the\n\
 percentage by which the left interval tree should not differ from the right.");
   interval_balance_threshold = 8;