diff --git a/system/base/glib2/files/2820-str-equal-cxx.patch b/system/base/glib2/files/2820-str-equal-cxx.patch
new file mode 100644
index 00000000..c0a7000c
--- /dev/null
+++ b/system/base/glib2/files/2820-str-equal-cxx.patch
@@ -0,0 +1,48 @@
+diff -Nuar a/glib/ghash.h b/glib/ghash.h
+--- a/glib/ghash.h	2022-11-24 15:29:05.000000000 +0300
++++ b/glib/ghash.h	2022-11-30 22:54:54.674385705 +0300
+@@ -162,7 +162,7 @@
+                          gconstpointer  v2);
+ 
+ /* Macro for optimization in the case it is not used as callback function */
+-#define g_str_equal(v1, v2) (strcmp ((gconstpointer) (v1), (gconstpointer) (v2)) == 0)
++#define g_str_equal(v1, v2) (strcmp ((const char *) (v1), (const char *) (v2)) == 0)
+ 
+ GLIB_AVAILABLE_IN_ALL
+ guint    g_str_hash     (gconstpointer  v);
+diff -Nuar a/glib/tests/cxx.cpp b/glib/tests/cxx.cpp
+@@ -192,15 +299,40 @@
+   g_assert_null (ptr);
+ }
+ 
++static void
++test_str_equal (void)
++{
++  const char *str_a = "a";
++  char *str_b = g_strdup ("b");
++  gconstpointer str_a_ptr = str_a, str_b_ptr = str_b;
++  const unsigned char *str_c = (const unsigned char *) "c";
++
++  g_test_summary ("Test typechecking and casting of arguments to g_str_equal() macro in C++");
++  g_test_bug ("https://gitlab.gnome.org/GNOME/glib/-/issues/2820");
++
++  /* We don’t actually care what the comparisons do at runtime. What we’re
++   * checking here is that the types don’t emit warnings at compile time. */
++  g_assert_true (g_str_equal ("a", str_a));
++  g_assert_false (g_str_equal ("a", str_b));
++  g_assert_true (g_str_equal (str_a, str_a_ptr));
++  g_assert_false (g_str_equal (str_a_ptr, str_b_ptr));
++  g_assert_false (g_str_equal (str_c, str_b));
++
++  g_free (str_b);
++}
++
+ int
+@@ -211,6 +343,7 @@
+   g_test_add_func ("/C++/inlined-not-inlined-functions", test_inline_no_inline_macros);
+   g_test_add_func ("/C++/clear-pointer", test_clear_pointer);
+   g_test_add_func ("/C++/steal-pointer", test_steal_pointer);
++  g_test_add_func ("/C++/str-equal", test_str_equal);
+ 
+   return g_test_run ();
+ }
diff --git a/system/base/glib2/pspec.xml b/system/base/glib2/pspec.xml
index bf8ba291..4fa7cc7e 100644
--- a/system/base/glib2/pspec.xml
+++ b/system/base/glib2/pspec.xml
@@ -27,6 +27,7 @@
         <Patches>
             <Patch level="1">noisy-glib-compile-schemas.diff</Patch>
             <Patch level="1">glib-2.68.2-skip_warnings-1.patch</Patch>
+            <Patch level="1">2820-str-equal-cxx.patch</Patch>
         </Patches>
         <AdditionalFiles>
             <AdditionalFile target="multilib.diff" permission="0644">multilib.diff</AdditionalFile>