diff --git a/CMakeLists.txt b/CMakeLists.txt
index ea4aa53..fe1db20 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.21)
-project(SDF_UTILITIES VERSION 2.6.15)
+project(SDF_UTILITIES VERSION 2.6.16)
 
 if(NOT TARGET sdfc)
     find_package(SDFC 14.4.9)
diff --git a/sdf2ascii.c b/sdf2ascii.c
index d09d547..3b1a107 100644
--- a/sdf2ascii.c
+++ b/sdf2ascii.c
@@ -30,7 +30,7 @@
 #include <mpi.h>
 #endif
 
-#define VERSION "2.6.15"
+#define VERSION "2.6.16"
 
 #define DBG_FLUSH() do { \
         if (h && h->dbg_buf) { \
diff --git a/sdf_python.c b/sdf_python.c
index 66fec4e..a647553 100644
--- a/sdf_python.c
+++ b/sdf_python.c
@@ -1870,7 +1870,7 @@ MOD_INIT(sdf)
     if (!m)
         return MOD_ERROR_VAL;
 
-    PyModule_AddStringConstant(m, "__version__", "2.6.15");
+    PyModule_AddStringConstant(m, "__version__", "2.6.16");
     PyModule_AddStringConstant(m, "__commit_id__", SDF_COMMIT_ID);
     PyModule_AddStringConstant(m, "__commit_date__", SDF_COMMIT_DATE);
     PyModule_AddStringConstant(m, "__library_commit_id__",
diff --git a/sdfdiff.c b/sdfdiff.c
index 97778f1..9353458 100644
--- a/sdfdiff.c
+++ b/sdfdiff.c
@@ -49,7 +49,7 @@
 #include <mpi.h>
 #endif
 
-#define VERSION "2.6.15"
+#define VERSION "2.6.16"
 
 #define MIN(a,b) (((a) < (b)) ? (a) : (b))
 #define ABS(a) (((a) < 0.0) ? -(a) : (a))
@@ -1494,7 +1494,6 @@ int diff_mesh(sdf_file_t **handles, sdf_block_t *b1, sdf_block_t *b2, int inum)
     int gotblock;
     static int gotdiff = 0;
     static const int fmtlen = 32;
-    static const int idxlen = 64;
     // char idxstr[idxlen]; doesn't work with Microsoft Visual C, so:
     char idxstr[64];
     char *prestr;
diff --git a/sdffilter.c b/sdffilter.c
index 9cffbc4..b8cd306 100644
--- a/sdffilter.c
+++ b/sdffilter.c
@@ -35,7 +35,7 @@
 #include <mpi.h>
 #endif
 
-#define VERSION "2.6.15"
+#define VERSION "2.6.16"
 
 #define MIN(a,b) (((a) < (b)) ? (a) : (b))