diff --git a/cranelift/fuzzgen/src/function_generator.rs b/cranelift/fuzzgen/src/function_generator.rs
index d8e6f78d64..829c463657 100644
--- a/cranelift/fuzzgen/src/function_generator.rs
+++ b/cranelift/fuzzgen/src/function_generator.rs
@@ -141,6 +141,58 @@ const OPCODE_SIGNATURES: &'static [(
     (Opcode::Sdiv, &[I32, I32], &[I32], insert_opcode),
     (Opcode::Sdiv, &[I64, I64], &[I64], insert_opcode),
     (Opcode::Sdiv, &[I128, I128], &[I128], insert_opcode),
+    // Rotr
+    (Opcode::Rotr, &[I8, I8], &[I8], insert_opcode),
+    (Opcode::Rotr, &[I8, I16], &[I8], insert_opcode),
+    (Opcode::Rotr, &[I8, I32], &[I8], insert_opcode),
+    (Opcode::Rotr, &[I8, I64], &[I8], insert_opcode),
+    (Opcode::Rotr, &[I8, I128], &[I8], insert_opcode),
+    (Opcode::Rotr, &[I16, I8], &[I16], insert_opcode),
+    (Opcode::Rotr, &[I16, I16], &[I16], insert_opcode),
+    (Opcode::Rotr, &[I16, I32], &[I16], insert_opcode),
+    (Opcode::Rotr, &[I16, I64], &[I16], insert_opcode),
+    (Opcode::Rotr, &[I16, I128], &[I16], insert_opcode),
+    (Opcode::Rotr, &[I32, I8], &[I32], insert_opcode),
+    (Opcode::Rotr, &[I32, I16], &[I32], insert_opcode),
+    (Opcode::Rotr, &[I32, I32], &[I32], insert_opcode),
+    (Opcode::Rotr, &[I32, I64], &[I32], insert_opcode),
+    (Opcode::Rotr, &[I32, I128], &[I32], insert_opcode),
+    (Opcode::Rotr, &[I64, I8], &[I64], insert_opcode),
+    (Opcode::Rotr, &[I64, I16], &[I64], insert_opcode),
+    (Opcode::Rotr, &[I64, I32], &[I64], insert_opcode),
+    (Opcode::Rotr, &[I64, I64], &[I64], insert_opcode),
+    (Opcode::Rotr, &[I64, I128], &[I64], insert_opcode),
+    (Opcode::Rotr, &[I128, I8], &[I128], insert_opcode),
+    (Opcode::Rotr, &[I128, I16], &[I128], insert_opcode),
+    (Opcode::Rotr, &[I128, I32], &[I128], insert_opcode),
+    (Opcode::Rotr, &[I128, I64], &[I128], insert_opcode),
+    (Opcode::Rotr, &[I128, I128], &[I128], insert_opcode),
+    // Rotl
+    (Opcode::Rotl, &[I8, I8], &[I8], insert_opcode),
+    (Opcode::Rotl, &[I8, I16], &[I8], insert_opcode),
+    (Opcode::Rotl, &[I8, I32], &[I8], insert_opcode),
+    (Opcode::Rotl, &[I8, I64], &[I8], insert_opcode),
+    (Opcode::Rotl, &[I8, I128], &[I8], insert_opcode),
+    (Opcode::Rotl, &[I16, I8], &[I16], insert_opcode),
+    (Opcode::Rotl, &[I16, I16], &[I16], insert_opcode),
+    (Opcode::Rotl, &[I16, I32], &[I16], insert_opcode),
+    (Opcode::Rotl, &[I16, I64], &[I16], insert_opcode),
+    (Opcode::Rotl, &[I16, I128], &[I16], insert_opcode),
+    (Opcode::Rotl, &[I32, I8], &[I32], insert_opcode),
+    (Opcode::Rotl, &[I32, I16], &[I32], insert_opcode),
+    (Opcode::Rotl, &[I32, I32], &[I32], insert_opcode),
+    (Opcode::Rotl, &[I32, I64], &[I32], insert_opcode),
+    (Opcode::Rotl, &[I32, I128], &[I32], insert_opcode),
+    (Opcode::Rotl, &[I64, I8], &[I64], insert_opcode),
+    (Opcode::Rotl, &[I64, I16], &[I64], insert_opcode),
+    (Opcode::Rotl, &[I64, I32], &[I64], insert_opcode),
+    (Opcode::Rotl, &[I64, I64], &[I64], insert_opcode),
+    (Opcode::Rotl, &[I64, I128], &[I64], insert_opcode),
+    (Opcode::Rotl, &[I128, I8], &[I128], insert_opcode),
+    (Opcode::Rotl, &[I128, I16], &[I128], insert_opcode),
+    (Opcode::Rotl, &[I128, I32], &[I128], insert_opcode),
+    (Opcode::Rotl, &[I128, I64], &[I128], insert_opcode),
+    (Opcode::Rotl, &[I128, I128], &[I128], insert_opcode),
     // Fadd
     (Opcode::Fadd, &[F32, F32], &[F32], insert_opcode),
     (Opcode::Fadd, &[F64, F64], &[F64], insert_opcode),