diff --git a/cangen.c b/cangen.c
index d086267..bd22b7d 100644
--- a/cangen.c
+++ b/cangen.c
@@ -328,7 +328,7 @@ int main(int argc, char **argv)
 		}
 
 		if (ifr.ifr_mtu != CANFD_MTU) {
-			printf("CAN interface ist not CAN FD capable - sorry.\n");
+			printf("CAN interface is not CAN FD capable - sorry.\n");
 			return 1;
 		}
 
diff --git a/cansend.c b/cansend.c
index b7f8003..3938029 100644
--- a/cansend.c
+++ b/cansend.c
@@ -115,7 +115,7 @@ int main(int argc, char **argv)
 		mtu = ifr.ifr_mtu;
 
 		if (mtu != CANFD_MTU) {
-			printf("CAN interface ist not CAN FD capable - sorry.\n");
+			printf("CAN interface is not CAN FD capable - sorry.\n");
 			return 1;
 		}