diff --git a/Objects/object.c b/Objects/object.c
index e1718ea..417a97d 100644
--- a/Objects/object.c
+++ b/Objects/object.c
@@ -644,7 +644,7 @@
 /* Map rich comparison operators to their swapped version, e.g. LT <--> GT */
 int _Py_SwappedOp[] = {Py_GT, Py_GE, Py_EQ, Py_NE, Py_LT, Py_LE};
 
-static char *opstrings[] = {"<", "<=", "==", "!=", ">", ">="};
+static const char * const opstrings[] = {"<", "<=", "==", "!=", ">", ">="};
 
 /* Perform a rich comparison, raising TypeError when the requested comparison
    operator is not supported. */
diff --git a/Objects/structseq.c b/Objects/structseq.c
index 7209738..e315cba 100644
--- a/Objects/structseq.c
+++ b/Objects/structseq.c
@@ -4,9 +4,9 @@
 #include "Python.h"
 #include "structmember.h"
 
-static char visible_length_key[] = "n_sequence_fields";
-static char real_length_key[] = "n_fields";
-static char unnamed_fields_key[] = "n_unnamed_fields";
+static const char visible_length_key[] = "n_sequence_fields";
+static const char real_length_key[] = "n_fields";
+static const char unnamed_fields_key[] = "n_unnamed_fields";
 
 /* Fields with this name have only a field index, not a field name.
    They are only allowed for indices < n_visible_fields. */
diff --git a/Objects/typeobject.c b/Objects/typeobject.c
index 341e18c..b4d23b2 100644
--- a/Objects/typeobject.c
+++ b/Objects/typeobject.c
@@ -2690,7 +2690,7 @@
     return NULL;
 }
 
-static short slotoffsets[] = {
+static const short slotoffsets[] = {
     -1, /* invalid slot */
 #include "typeslots.inc"
 };
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index a985d6f..fef184a 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -272,7 +272,7 @@
                        const char *reason);
 
 /* Same for linebreaks */
-static unsigned char ascii_linebreak[] = {
+static const unsigned char ascii_linebreak[] = {
     0, 0, 0, 0, 0, 0, 0, 0,
 /*         0x000A, * LINE FEED */
 /*         0x000B, * LINE TABULATION */
@@ -4135,7 +4135,7 @@
     Py_ssize_t *endinpos, PyObject **exceptionObject, const char **inptr,
     PyObject **output, Py_ssize_t *outpos)
 {
-    static char *argparse = "O!n;decoding error handler must return (str, int) tuple";
+    static const char *argparse = "O!n;decoding error handler must return (str, int) tuple";
 
     PyObject *restuple = NULL;
     PyObject *repunicode = NULL;
@@ -4243,7 +4243,7 @@
     Py_ssize_t *endinpos, PyObject **exceptionObject, const char **inptr,
     _PyUnicodeWriter *writer /* PyObject **output, Py_ssize_t *outpos */)
 {
-    static char *argparse = "O!n;decoding error handler must return (str, int) tuple";
+    static const char *argparse = "O!n;decoding error handler must return (str, int) tuple";
 
     PyObject *restuple = NULL;
     PyObject *repunicode = NULL;
@@ -6560,7 +6560,7 @@
                                  Py_ssize_t startpos, Py_ssize_t endpos,
                                  Py_ssize_t *newpos)
 {
-    static char *argparse = "On;encoding error handler must return (str/bytes, int) tuple";
+    static const char *argparse = "On;encoding error handler must return (str/bytes, int) tuple";
     Py_ssize_t len;
     PyObject *restuple;
     PyObject *resunicode;
@@ -8572,7 +8572,7 @@
                                     Py_ssize_t startpos, Py_ssize_t endpos,
                                     Py_ssize_t *newpos)
 {
-    static char *argparse = "O!n;translating error handler must return (str, int) tuple";
+    static const char *argparse = "O!n;translating error handler must return (str, int) tuple";
 
     Py_ssize_t i_newpos;
     PyObject *restuple;
@@ -12156,7 +12156,7 @@
 #define BOTHSTRIP 2
 
 /* Arrays indexed by above */
-static const char *stripformat[] = {"|O:lstrip", "|O:rstrip", "|O:strip"};
+static const char * const stripformat[] = {"|O:lstrip", "|O:rstrip", "|O:strip"};
 
 #define STRIPNAME(i) (stripformat[i]+3)