1 files changed, 5 insertions, 2 deletions
diff --git a/tests/stdio/test_fgetc_ungetc.c b/tests/stdio/test_fgetc_ungetc.c
index c69a3d1a..0eea4007 100644
--- a/tests/stdio/test_fgetc_ungetc.c
+++ b/tests/stdio/test_fgetc_ungetc.c
@@ -1,5 +1,6 @@
 #include <assert.h>
 #include <fcntl.h>
+#include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -47,7 +48,9 @@ void test() {
   ungetc('a', file);
   err = fgetc(file);
   assert(err == (int)'a');
-  fread(buffer, sizeof(char), sizeof(buffer), file);
+  int r = fread(buffer, sizeof(char), sizeof(buffer), file);
+  assert(r == 3);
+  buffer[3] = 0;
   assert(!strcmp(buffer, "bcd"));
 
   // rewind and fseek should reset anything that's been
@@ -84,4 +87,4 @@ int main() {
   setup();
   test();
   return EXIT_SUCCESS;
-}
-\ No newline at end of file
+}