diff --git a/lib/runtime-c-api/src/export.rs b/lib/runtime-c-api/src/export.rs
index cdb953e24..d93f987a4 100644
--- a/lib/runtime-c-api/src/export.rs
+++ b/lib/runtime-c-api/src/export.rs
@@ -402,6 +402,7 @@ pub unsafe extern "C" fn wasmer_export_func_call(
                         tag: wasmer_value_tag::WASM_F64,
                         value: wasmer_value { F64: x },
                     },
+                    _ => panic!("not implemented"),
                 };
                 results[0] = ret;
             }
diff --git a/lib/runtime-c-api/src/instance.rs b/lib/runtime-c-api/src/instance.rs
index 79a617be2..4fc76f766 100644
--- a/lib/runtime-c-api/src/instance.rs
+++ b/lib/runtime-c-api/src/instance.rs
@@ -173,6 +173,7 @@ pub unsafe extern "C" fn wasmer_instance_call(
                         tag: wasmer_value_tag::WASM_F64,
                         value: wasmer_value { F64: x },
                     },
+                    _ => panic!("not implemented"),
                 };
                 results[0] = ret;
             }
diff --git a/lib/runtime-c-api/src/value.rs b/lib/runtime-c-api/src/value.rs
index d6b7b506a..62f62c3ac 100644
--- a/lib/runtime-c-api/src/value.rs
+++ b/lib/runtime-c-api/src/value.rs
@@ -76,6 +76,7 @@ impl From<Value> for wasmer_value_t {
                 tag: wasmer_value_tag::WASM_F64,
                 value: wasmer_value { F64: x },
             },
+            _ => panic!("not implemented"),
         }
     }
 }
@@ -113,6 +114,7 @@ impl From<&wasmer_runtime::wasm::Type> for wasmer_value_tag {
             Type::I64 => wasmer_value_tag::WASM_I64,
             Type::F32 => wasmer_value_tag::WASM_F32,
             Type::F64 => wasmer_value_tag::WASM_F64,
+            _ => panic!("not implemented"),
         }
     }
 }