Posix says ssize_t is in sys/types.h; on Linux stdlib.h is enough.
-#include "config.h"
 #include <ccan/tally/tally.h>
 #include <ccan/build_assert/build_assert.h>
 #include <ccan/likely/likely.h>
 #include <string.h>
 #include <stdio.h>
 #include <assert.h>
+#include <stdlib.h>
 
 #define SIZET_BITS (sizeof(size_t)*CHAR_BIT)
 
 
 #ifndef CCAN_TALLY_H
 #define CCAN_TALLY_H
-#include <stdlib.h>
+#include "config.h"
+#include <sys/types.h>
 
 struct tally;
 
 
                ok1(tally_mean(tally) == 0);
        }
 
+       free(tally);
        return exit_status();
 }
 
                ok1(median - (ssize_t)err <= i/2
                    && median + (ssize_t)err >= i/2);
        }
+       free(tally);
 
        return exit_status();
 }
 
                ok1(tally_max(tally) == i);
                ok1(tally_min(tally) == -i);
        }
+       free(tally);
        return exit_status();
 }
 
                ok1(mode - (ssize_t)err <= 0 && mode + (ssize_t)err >= 0);
        }
 
+       free(tally);
        return exit_status();
 }
 
        ok1(tally->counts[0] == 2);
        ok1(tally->counts[1] == 0);
 
+       free(tally);
        return exit_status();
 }