diff --git a/CHANGES b/CHANGES
index 035534dd31..e60d27c779 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+5796.	[bug]		Ignore the invalid (<= 0) values returned
+			by the sysconf() check for the L1 cache line
+			size.  [GL #3108]
+
 5795.	[bug]		rndc could crash when interrupted by a signal
 			before receiving a response. [GL #3080]
 
diff --git a/lib/isc/os.c b/lib/isc/os.c
index 2bb7dc2158..9e2b08ce16 100644
--- a/lib/isc/os.c
+++ b/lib/isc/os.c
@@ -81,7 +81,7 @@ isc__os_initialize(void) {
 	ncpus_initialize();
 #if defined(HAVE_SYSCONF) && defined(_SC_LEVEL1_DCACHE_LINESIZE)
 	long s = sysconf(_SC_LEVEL1_DCACHE_LINESIZE);
-	RUNTIME_CHECK((size_t)s == (size_t)ISC_OS_CACHELINE_SIZE);
+	RUNTIME_CHECK((size_t)s == (size_t)ISC_OS_CACHELINE_SIZE || s <= 0);
 #endif
 }