diff --git a/src/runtime/os1_darwin.go b/src/runtime/os1_darwin.go
index 3a5ed7c9a04..6a603144942 100644
--- a/src/runtime/os1_darwin.go
+++ b/src/runtime/os1_darwin.go
@@ -45,7 +45,7 @@ func osinit() {
 	}
 }
 
-var urandom_dev = []byte("/dev/random\x00")
+var urandom_dev = []byte("/dev/urandom\x00")
 
 //go:nosplit
 func getRandomData(r []byte) {
diff --git a/src/runtime/os1_freebsd.go b/src/runtime/os1_freebsd.go
index 5a5c3862d33..f49f28edfff 100644
--- a/src/runtime/os1_freebsd.go
+++ b/src/runtime/os1_freebsd.go
@@ -96,7 +96,7 @@ func osinit() {
 	ncpu = getncpu()
 }
 
-var urandom_dev = []byte("/dev/random\x00")
+var urandom_dev = []byte("/dev/urandom\x00")
 
 //go:nosplit
 func getRandomData(r []byte) {
diff --git a/src/runtime/os1_linux.go b/src/runtime/os1_linux.go
index a10e4e9aa1c..44da57ab0b6 100644
--- a/src/runtime/os1_linux.go
+++ b/src/runtime/os1_linux.go
@@ -145,7 +145,7 @@ func osinit() {
 	ncpu = getproccount()
 }
 
-var urandom_dev = []byte("/dev/random\x00")
+var urandom_dev = []byte("/dev/urandom\x00")
 
 func getRandomData(r []byte) {
 	if startupRandomData != nil {
diff --git a/src/runtime/os3_solaris.go b/src/runtime/os3_solaris.go
index f045346c078..cd7dc838667 100644
--- a/src/runtime/os3_solaris.go
+++ b/src/runtime/os3_solaris.go
@@ -165,7 +165,7 @@ func newosproc(mp *m, _ unsafe.Pointer) {
 	}
 }
 
-var urandom_dev = []byte("/dev/random\x00")
+var urandom_dev = []byte("/dev/urandom\x00")
 
 //go:nosplit
 func getRandomData(r []byte) {