diff --git a/site/tests/cli_runner.uce b/site/tests/cli_runner.uce
index b2321b5..2c03fe6 100644
--- a/site/tests/cli_runner.uce
+++ b/site/tests/cli_runner.uce
@@ -149,6 +149,7 @@ StringList cli_demo_error_markers()
 	markers.push_back(String("uce compile ") + "error");
 	markers.push_back(String("fatal signal during ") + "request");
 	markers.push_back(String("uncaught exception during ") + "request");
+	markers.push_back("component not found");
 	return(markers);
 }
 
diff --git a/src/wasm/core.cpp b/src/wasm/core.cpp
index ce37190..e4299b1 100644
--- a/src/wasm/core.cpp
+++ b/src/wasm/core.cpp
@@ -450,6 +450,10 @@ extern "C" void uce_wasm_link_anchors()
 		(void*)&isdigit, (void*)&isgraph, (void*)&islower, (void*)&isprint,
 		(void*)&ispunct, (void*)&isspace, (void*)&isupper, (void*)&isxdigit,
 		(void*)&tolower, (void*)&toupper,
+		// math functions used by side modules but not otherwise retained by core
+		(void*)(double (*)(double))&cos,
+		(void*)(double (*)(double))&sin,
+		(void*)(double (*)(double))&round,
 	};
 	(void)libc_anchors;
 }
diff --git a/src/wasm/core_libc_exports.syms b/src/wasm/core_libc_exports.syms
index 232046e..66eb973 100644
--- a/src/wasm/core_libc_exports.syms
+++ b/src/wasm/core_libc_exports.syms
@@ -33,3 +33,6 @@ isupper
 isxdigit
 tolower
 toupper
+cos
+sin
+round