diff --git a/service/OneService.cpp b/service/OneService.cpp
index 5a05c72ce..ff79c6f85 100644
--- a/service/OneService.cpp
+++ b/service/OneService.cpp
@@ -2664,6 +2664,11 @@ public:
 			}
 			setUpMultithreading();
 		}
+		else {
+			// Force values in case the user accidentally defined them with multicore disabled
+			_concurrency = 1;
+			_cpuPinningEnabled = false;
+		}
 #endif
 
 #ifndef ZT_SDK