diff --git a/src/pkg/runtime/sys_darwin_amd64.s b/src/pkg/runtime/sys_darwin_amd64.s
index 86f9936614..e0dbdb7c16 100644
--- a/src/pkg/runtime/sys_darwin_amd64.s
+++ b/src/pkg/runtime/sys_darwin_amd64.s
@@ -175,7 +175,7 @@ TEXT runtime·usleep(SB),7,$16
 	MOVL	$0, DX
 	MOVL	$0, R10
 	MOVQ	SP, R8
-	MOVL	$(0x2000000+23), AX
+	MOVL	$(0x2000000+93), AX
 	SYSCALL
 	RET
 
diff --git a/src/pkg/runtime/sys_linux_arm.s b/src/pkg/runtime/sys_linux_arm.s
index e0e4135b54..c3a828a924 100644
--- a/src/pkg/runtime/sys_linux_arm.s
+++ b/src/pkg/runtime/sys_linux_arm.s
@@ -34,7 +34,7 @@
 #define SYS_gettid (SYS_BASE + 224)
 #define SYS_tkill (SYS_BASE + 238)
 #define SYS_sched_yield (SYS_BASE + 158)
-#define SYS_select (SYS_BASE + 82)
+#define SYS_select (SYS_BASE + 142) // newselect
 
 #define ARM_BASE (SYS_BASE + 0x0f0000)
 #define SYS_ARM_cacheflush (ARM_BASE + 2)
@@ -313,10 +313,10 @@ TEXT runtime·usleep(SB),7,$12
 	MOVW	usec+0(FP), R0
 	MOVW	R0, R1
 	MOVW	$1000000, R2
-	DIV	R1, R0
-	MOD	R2, R0
-	MOVW	R1, 4(SP)
-	MOVW	R2, 8(SP)
+	DIV	R2, R0
+	MOD	R2, R1
+	MOVW	R0, 4(SP)
+	MOVW	R1, 8(SP)
 	MOVW	$0, R0
 	MOVW	$0, R1
 	MOVW	$0, R2