diff --git a/src/basic/math/b86a.add_FAC2_FAC1.s b/src/basic/math/b86a.add_FAC2_FAC1.s
index fa661d15..bd4138f2 100644
--- a/src/basic/math/b86a.add_FAC2_FAC1.s
+++ b/src/basic/math/b86a.add_FAC2_FAC1.s
@@ -31,7 +31,7 @@ add_FAC2_FAC1:
     lda FAC2_exponent
 FADDC:
     tay
-    beq FADDC;ZERRTS
+    beq ZERRTS
     sec
     sbc FAC1_exponent
     beq FADD4           ; No shifting
diff --git a/src/basic/math/b8fe.add_mantissas_FAC2_FAC1.s b/src/basic/math/b8fe.add_mantissas_FAC2_FAC1.s
index 5daed3a4..2ee93514 100644
--- a/src/basic/math/b8fe.add_mantissas_FAC2_FAC1.s
+++ b/src/basic/math/b8fe.add_mantissas_FAC2_FAC1.s
@@ -36,6 +36,6 @@ add_mantissas_FAC2_FAC1:
 
     lda FAC1_mantissa+0
     adc FAC2_mantissa+0
-    sta FAC2_mantissa+0
+    sta FAC1_mantissa+0
 
     jmp shift_carry_into_FAC1