diff --git a/test/signal-logging.c b/test/signal-logging.c
index 9bf39e58d..ca327e9aa 100644
--- a/test/signal-logging.c
+++ b/test/signal-logging.c
@@ -148,7 +148,7 @@ number_formatting(void)
     for (i = 0; i < sizeof(unsigned_tests) / sizeof(unsigned_tests[0]); i++)
         assert(check_number_format_test(unsigned_tests[i]));
 
-    for (i = 0; i < sizeof(unsigned_tests) / sizeof(signed_tests[0]); i++)
+    for (i = 0; i < sizeof(signed_tests) / sizeof(signed_tests[0]); i++)
         assert(check_signed_number_format_test(signed_tests[i]));
 
     for (i = 0; i < sizeof(float_tests) / sizeof(float_tests[0]); i++)