diff --git a/sys/dev/sym/sym_fw1.h b/sys/dev/sym/sym_fw1.h
index 60c929af76b0..4d0e99cd86bc 100644
--- a/sys/dev/sym/sym_fw1.h
+++ b/sys/dev/sym/sym_fw1.h
@@ -1027,7 +1027,7 @@ static const struct SYM_FWA_SCR SYM_FWA_SCR = {
 	 *  It shall be a tagged command.
 	 *  Read SIMPLE+TAG.
 	 *  The C code will deal with errors.
-	 *  Aggressive optimization, is'nt it? :)
+	 *  Aggressive optimization, isn't it? :)
 	 */
 	SCR_MOVE_ABS (2) ^ SCR_MSG_IN,
 		HADDR_1 (msgin),
diff --git a/sys/dev/sym/sym_fw2.h b/sys/dev/sym/sym_fw2.h
index 60c88b256562..b14ee83fe324 100644
--- a/sys/dev/sym/sym_fw2.h
+++ b/sys/dev/sym/sym_fw2.h
@@ -945,7 +945,7 @@ static const struct SYM_FWA_SCR SYM_FWA_SCR = {
 	 *  It shall be a tagged command.
 	 *  Read SIMPLE+TAG.
 	 *  The C code will deal with errors.
-	 *  Aggressive optimization, is'nt it? :)
+	 *  Aggressive optimization, isn't it? :)
 	 */
 	SCR_MOVE_ABS (2) ^ SCR_MSG_IN,
 		HADDR_1 (msgin),