diff --git a/src/pdstemplates.c b/src/pdstemplates.c
index 6ab61d1d..59e79d2c 100644
--- a/src/pdstemplates.c
+++ b/src/pdstemplates.c
@@ -131,7 +131,7 @@ static const struct pdstemplate templatespds[G2C_MAX_PDS_TEMPLATE] =
     {1000, 9, 0, {1, 1, 1, 1, 1, 2, 1, 1, -4}},
     /** 4.1001: Cross section of Ave/Accum/etc... analysis or forecast
         in a time interval */
-    {1001, 16, 0, {1, 1, 1, 1, 1, 2, 1, 1, 4, 4, 1, 1, 1, 4, 1, 4}},
+    {1001, 16, 0, {1, 1, 1, 1, 1, 2, 1, 1, -4, 4, 1, 1, 1, 4, 1, 4}},
     /** 4.1001: Cross section of Ave/Accum/etc... analysis or forecast
         over latitude or longitude */
     {1002, 15, 0, {1, 1, 1, 1, 1, 2, 1, 1, -4, 1, 1, 1, 4, 4, 2}},
diff --git a/tests/tst_pdstemplates.c b/tests/tst_pdstemplates.c
index 3d602517..26332e10 100644
--- a/tests/tst_pdstemplates.c
+++ b/tests/tst_pdstemplates.c
@@ -397,7 +397,7 @@ main()
             {1, 1, 2, 1, 1, 1, 2, 1, 1, -4, 1, -1, -4, 1, -1, -4, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 4, 1, 1, 1, 4, 1, 4}, /* 43 */
             {1, 1, 4}, /* 254 */
             {1, 1, 1, 1, 1, 2, 1, 1, -4}, /* 1000 */
-            {1, 1, 1, 1, 1, 2, 1, 1, 4, 4, 1, 1, 1, 4, 1, 4}, /* 1001 */
+            {1, 1, 1, 1, 1, 2, 1, 1, -4, 4, 1, 1, 1, 4, 1, 4}, /* 1001 */
             {1, 1, 1, 1, 1, 2, 1, 1, -4, 1, 1, 1, 4, 4, 2}, /* 1002 */
             {1, 1, 1, 1, 1, 2, 1, 1, -4, 1, -1, -4, 1, -1, -4}, /* 1100 */
             {1, 1, 1, 1, 1, 2, 1, 1, -4, 1, -1, -4, 1, -1, -4, 4, 1, 1, 1, 4, 1, 4}, /* 1101 */