diff --git a/sys/amd64/linux/linux.h b/sys/amd64/linux/linux.h
--- a/sys/amd64/linux/linux.h
+++ b/sys/amd64/linux/linux.h
@@ -90,7 +90,10 @@
 /*
  * Miscellaneous
  */
-#define LINUX_AT_COUNT		21	/* Count of used aux entry types. */
+#define LINUX_AT_COUNT		21	/* Count of used aux entry types.
+					 * Keep this synchronized with
+					 * linux_copyout_auxargs() code.
+					 */
 
 struct l___sysctl_args
 {
diff --git a/sys/amd64/linux32/linux.h b/sys/amd64/linux32/linux.h
--- a/sys/amd64/linux32/linux.h
+++ b/sys/amd64/linux32/linux.h
@@ -105,7 +105,7 @@
  */
 #define	LINUX_AT_COUNT		22	/* Count of used aux entry types.
 					 * Keep this synchronized with
-					 * linux_fixup_elf() code.
+					 * linux_copyout_auxargs() code.
 					 */
 struct l___sysctl_args
 {
diff --git a/sys/arm64/linux/linux.h b/sys/arm64/linux/linux.h
--- a/sys/arm64/linux/linux.h
+++ b/sys/arm64/linux/linux.h
@@ -81,7 +81,10 @@
 #define	l_fd_set	fd_set
 
 /* Miscellaneous */
-#define	LINUX_AT_COUNT		21
+#define	LINUX_AT_COUNT		21	/* Count of used aux entry types.
+					 * Keep this synchronized with
+					 * linux_copyout_auxargs() code.
+					 */
 
 struct l___sysctl_args
 {
diff --git a/sys/i386/linux/linux.h b/sys/i386/linux/linux.h
--- a/sys/i386/linux/linux.h
+++ b/sys/i386/linux/linux.h
@@ -97,7 +97,7 @@
  */
 #define LINUX_AT_COUNT		21	/* Count of used aux entry types.
 					 * Keep this synchronized with
-					 * linux_fixup_elf() code.
+					 * linux_copyout_auxargs() code.
 					 */
 struct l___sysctl_args
 {