diff --git a/arch/avr/src/at32uc3/at32uc3_timerisr.c b/arch/avr/src/at32uc3/at32uc3_timerisr.c
index 655b312e7dd..aa341c3afed 100644
--- a/arch/avr/src/at32uc3/at32uc3_timerisr.c
+++ b/arch/avr/src/at32uc3/at32uc3_timerisr.c
@@ -126,7 +126,7 @@
 #  define AV32_PSEL 1
 #  define AV32_TOP (82-1)
 #else
-#  define AV32_PSEL 3
+#  define AV32_PSEL 2
 #  define AV32_TOP (144-1)
 #endif
 
diff --git a/arch/avr/src/avr32/up_switchcontext.S b/arch/avr/src/avr32/up_switchcontext.S
index 8ecfbe2cd6b..5cddc17a149 100755
--- a/arch/avr/src/avr32/up_switchcontext.S
+++ b/arch/avr/src/avr32/up_switchcontext.S
@@ -94,7 +94,7 @@ up_switchcontext:
 	mfsr	r10, AVR32_SR
 	sub		r12, -4*(REG_LR+1)
 
-	/* Then "push" PC=LR, LR, SR, and SP as ther are on entry.                      */
+	/* Then "push" PC=LR, LR, SR, and SP as they are on entry.                      */
 	/*     xx xx xx xx xx xx xx xx SP SR PC LR xx xx xx xx xx                       */
 	/*                             ^r12                                             */