diff --git a/string/tst-strsignal.c b/string/tst-strsignal.c
index 93a46dbc78..3f6764989f 100644
--- a/string/tst-strsignal.c
+++ b/string/tst-strsignal.c
@@ -34,10 +34,12 @@ do_test (void)
   TEST_COMPARE_STRING (strsignal (SIGINT),     "Interrupt");
   TEST_COMPARE_STRING (strsignal (-1),         "Unknown signal -1");
 #ifdef SIGRTMIN
-  TEST_COMPARE_STRING (strsignal (SIGRTMIN),   "Real-time signal 0");
+  if (SIGRTMIN < SIGRTMAX)
+    TEST_COMPARE_STRING (strsignal (SIGRTMIN),   "Real-time signal 0");
 #endif
 #ifdef SIGRTMAX
-  TEST_COMPARE_STRING (strsignal (SIGRTMAX+1), "Unknown signal 65");
+  if (SIGRTMAX == 64)
+    TEST_COMPARE_STRING (strsignal (SIGRTMAX+1), "Unknown signal 65");
 #endif
 
   xsetlocale (LC_ALL, "pt_BR.UTF-8");
@@ -45,10 +47,12 @@ do_test (void)
   TEST_COMPARE_STRING (strsignal (SIGINT),    "Interrup\xc3\xa7\xc3\xa3\x6f");
   TEST_COMPARE_STRING (strsignal (-1),        "Sinal desconhecido -1");
 #ifdef SIGRTMI
-  TEST_COMPARE_STRING (strsignal (SIGRTMIN),  "Sinal de tempo-real 0");
+  if (SIGRTMIN < SIGRTMAX)
+    TEST_COMPARE_STRING (strsignal (SIGRTMIN),  "Sinal de tempo-real 0");
 #endif
 #ifdef SIGRTMAX
-  TEST_COMPARE_STRING (strsignal (SIGRTMAX+1), "Sinal desconhecido 65");
+  if (SIGRTMAX == 64)
+    TEST_COMPARE_STRING (strsignal (SIGRTMAX+1), "Sinal desconhecido 65");
 #endif
 
   return 0;