diff --git a/src/interpreter.c b/src/interpreter.c
index a4562fe..8498e29 100644
--- a/src/interpreter.c
+++ b/src/interpreter.c
@@ -1900,7 +1900,7 @@ GroundValue interpretGroundInstruction(GroundInstruction inst, GroundScope* scop
                         runtimeError(ARG_TYPE_MISMATCH, "Expecting a Value", in, currentInstruction);
                     }
                     if (function->nativeFn) {
-                        if (function->args[i].type != ANY || in->args.args[i + 1].value.value.type != function->args[i].type) {
+                        if (function->args[i].type != ANY && in->args.args[i + 1].value.value.type != function->args[i].type) {
                             runtimeError(ARG_TYPE_MISMATCH, "Mismatched function argument types", in, currentInstruction);
                         }
                     } else {
@@ -2004,7 +2004,7 @@ GroundValue interpretGroundInstruction(GroundInstruction inst, GroundScope* scop
                         runtimeError(ARG_TYPE_MISMATCH, "Expecting a Value", in, currentInstruction);
                     }
                     if (function->nativeFn) {
-                        if (function->args[i].type != ANY || in->args.args[i + 2].value.value.type != function->args[i].type) {
+                        if (function->args[i].type != ANY && in->args.args[i + 2].value.value.type != function->args[i].type) {
                             runtimeError(ARG_TYPE_MISMATCH, "Mismatched function argument types", in, currentInstruction);
                         }
                     } else {