diff --git a/Makefile b/Makefile
index 8ab585a..c50efcf 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-CFLAGS=--std=c99 -O2 -Wall -Wextra -Werror -pedantic
+CFLAGS=--std=c18 -O2 -Wall -Wextra -Werror -pedantic
 
 annotate: annotate.o
 
diff --git a/annotate.c b/annotate.c
index f70601c..9eab74d 100644
--- a/annotate.c
+++ b/annotate.c
@@ -45,15 +45,9 @@ int main() {
         output_time = false;
       }
 
+      fputc(buffer[i], stdout);
       if (buffer[i] == '\n') {
-        printf("\n");
-        if (fflush(stdout) == EOF) {
-          perror("Unable to flush stdout");
-          exit(2);
-        }
         output_time = true;
-      } else {
-        fputc(buffer[i], stdout);
       }
     }
   }