diff --git a/SRC/cgesdd.f b/SRC/cgesdd.f
index 4354349fbe..2a56a277ae 100644
--- a/SRC/cgesdd.f
+++ b/SRC/cgesdd.f
@@ -199,9 +199,10 @@
 *> \param[out] INFO
 *> \verbatim
 *>          INFO is INTEGER
-*>          = 0:  successful exit.
-*>          < 0:  if INFO = -i, the i-th argument had an illegal value.
-*>          > 0:  The updating process of SBDSDC did not converge.
+*>          <  0:  if INFO = -i, the i-th argument had an illegal value.
+*>          = -4:  if A had a NAN entry.
+*>          >  0:  The updating process of SBDSDC did not converge.
+*>          =  0:  successful exit.
 *> \endverbatim
 *
 *  Authors:
diff --git a/SRC/dgesdd.f b/SRC/dgesdd.f
index a6770999c0..9b4f1c009a 100644
--- a/SRC/dgesdd.f
+++ b/SRC/dgesdd.f
@@ -191,9 +191,10 @@
 *> \param[out] INFO
 *> \verbatim
 *>          INFO is INTEGER
-*>          = 0:  successful exit.
-*>          < 0:  if INFO = -i, the i-th argument had an illegal value.
-*>          > 0:  DBDSDC did not converge, updating process failed.
+*>          <  0:  if INFO = -i, the i-th argument had an illegal value.
+*>          = -4:  if A had a NAN entry.
+*>          >  0:  DBDSDC did not converge, updating process failed.
+*>          =  0:  successful exit.
 *> \endverbatim
 *
 *  Authors:
diff --git a/SRC/sgesdd.f b/SRC/sgesdd.f
index a2a03ee58f..4e0afaa015 100644
--- a/SRC/sgesdd.f
+++ b/SRC/sgesdd.f
@@ -191,9 +191,10 @@
 *> \param[out] INFO
 *> \verbatim
 *>          INFO is INTEGER
-*>          = 0:  successful exit.
-*>          < 0:  if INFO = -i, the i-th argument had an illegal value.
-*>          > 0:  SBDSDC did not converge, updating process failed.
+*>          <  0:  if INFO = -i, the i-th argument had an illegal value.
+*>          = -4:  if A had a NAN entry.
+*>          >  0:  SBDSDC did not converge, updating process failed.
+*>          =  0:  successful exit.
 *> \endverbatim
 *
 *  Authors:
diff --git a/SRC/zgesdd.f b/SRC/zgesdd.f
index f7f04836cf..3ab8b72a9c 100644
--- a/SRC/zgesdd.f
+++ b/SRC/zgesdd.f
@@ -199,9 +199,10 @@
 *> \param[out] INFO
 *> \verbatim
 *>          INFO is INTEGER
-*>          = 0:  successful exit.
-*>          < 0:  if INFO = -i, the i-th argument had an illegal value.
-*>          > 0:  The updating process of DBDSDC did not converge.
+*>          <  0:  if INFO = -i, the i-th argument had an illegal value.
+*>          = -4:  if A had a NAN entry.
+*>          >  0:  The updating process of DBDSDC did not converge.
+*>          =  0:  successful exit.
 *> \endverbatim
 *
 *  Authors: