diff --git a/tests/checkasm/checkasm.h b/tests/checkasm/checkasm.h
index b601a98754..d7645d3730 100644
--- a/tests/checkasm/checkasm.h
+++ b/tests/checkasm/checkasm.h
@@ -230,8 +230,10 @@ typedef struct CheckasmPerf {
     ioctl(sysfd, PERF_EVENT_IOC_ENABLE, 0);             \
 } while (0)
 #define PERF_STOP(t) do {                               \
+    int ret;                                            \
     ioctl(sysfd, PERF_EVENT_IOC_DISABLE, 0);            \
-    read(sysfd, &t, sizeof(t));                         \
+    ret = read(sysfd, &t, sizeof(t));                   \
+    (void)ret;                                          \
 } while (0)
 #elif CONFIG_MACOS_KPERF
 #define PERF_START(t) t = ff_kperf_cycles()