diff --git a/source/compiler.c b/source/compiler.c
index dd5bbb7..ac0fd9f 100644
--- a/source/compiler.c
+++ b/source/compiler.c
@@ -405,6 +405,12 @@ static void writeCompilerWithJumps(Compiler* compiler, Node* node, void* breakAd
 			//NOTE: assume the function definition/name is above us
 
 			for (int i = 0; i < node->fnCall.arguments->fnCollection.count; i++) { //reverse order, to count from the beginning in the interpreter
+				//sub-calls
+				if (node->fnCall.arguments->fnCollection.nodes[i].type != NODE_LITERAL) {
+					writeCompilerWithJumps(compiler, &node->fnCall.arguments->fnCollection.nodes[i], breakAddressesPtr, continueAddressesPtr);
+					continue;
+				}
+
 				//write each argument to the bytecode
 				int argumentsIndex = findLiteralIndex(&compiler->literalCache, node->fnCall.arguments->fnCollection.nodes[i].atomic.literal);
 				if (argumentsIndex < 0) {
diff --git a/test/functions.toy b/test/functions.toy
index 24be460..8a1ee05 100644
--- a/test/functions.toy
+++ b/test/functions.toy
@@ -29,4 +29,17 @@ var tally = make();
 
 assert tally() == 1 && tally() == 2, "Closures failed";
 
+
+//expressions as arguments
+fn argFn() {
+	return 42;
+}
+
+fn outerFn(val) {
+	assert val == 42, "expression as argument failed";
+}
+
+outerFn(argFn());
+
+
 print "All good";
\ No newline at end of file