diff --git a/doc/scalar/insns/sm4ed.adoc b/doc/scalar/insns/sm4ed.adoc
index 01e20f92..5753114f 100644
--- a/doc/scalar/insns/sm4ed.adoc
+++ b/doc/scalar/insns/sm4ed.adoc
@@ -27,7 +27,7 @@ Implements a T-tables in hardware style approach to accelerating the
 SM4 round function.
 A byte is extracted from `rs2` based on `bs`, to which the SBox and
 linear layer transforms are applied, before the result is XOR'd with
-`rt` and written back to `rd`.
+`rs1` and written back to `rd`.
 This instruction exists on RV32 and RV64 base architectures.
 On RV64, the 32-bit result is sign extended upto XLEN bits.
 This instruction must _always_ be implemented such that it's execution
diff --git a/doc/scalar/insns/sm4ks.adoc b/doc/scalar/insns/sm4ks.adoc
index 81c10d60..cbb55697 100644
--- a/doc/scalar/insns/sm4ks.adoc
+++ b/doc/scalar/insns/sm4ks.adoc
@@ -27,7 +27,7 @@ Implements a T-tables in hardware style approach to accelerating the
 SM4 Key Schedule.
 A byte is extracted from `rs2` based on `bs`, to which the SBox and
 linear layer transforms are applied, before the result is XOR'd with
-`rt` and written back to `rd`.
+`rs1` and written back to `rd`.
 This instruction exists on RV32 and RV64 base architectures.
 On RV64, the 32-bit result is sign extended upto XLEN bits.
 This instruction must _always_ be implemented such that it's execution