diff --git a/m4/compiler_options.m4 b/m4/compiler_options.m4
index 060899464c..843eb7b492 100644
--- a/m4/compiler_options.m4
+++ b/m4/compiler_options.m4
@@ -90,6 +90,7 @@ if test "$GCC" = "yes" -a "$set_more_warnings" != "no"; then
 		      $_CFLAGS_MORE_WARNINGS_DISABLE_LTO \
 		      -Wall \
 		      -Wextra \
+		      -Wcast-align=strict \
 		      -Wdeclaration-after-statement \
 		      -Wfloat-equal \
 		      -Wformat-nonliteral \
diff --git a/meson.build b/meson.build
index 696a113e91..d956704e61 100644
--- a/meson.build
+++ b/meson.build
@@ -174,6 +174,7 @@ endif
 common_flags += cc.get_supported_arguments([
   '-Wall',
   '-Wextra',
+  '-Wcast-align=strict',
   '-Wdeclaration-after-statement',
   '-Wfloat-equal',
   '-Wformat-nonliteral',