diff --git a/src/java/org/lwjgl/util/generator/GeneratorProcessor.java b/src/java/org/lwjgl/util/generator/GeneratorProcessor.java
index 6bf50e0d..d5240a65 100644
--- a/src/java/org/lwjgl/util/generator/GeneratorProcessor.java
+++ b/src/java/org/lwjgl/util/generator/GeneratorProcessor.java
@@ -94,7 +94,7 @@ public final class GeneratorProcessor extends AbstractProcessor {
 			first_round = false;
 			return true;
 		} catch (Exception e) {
-			throw new RuntimeException(e);
+			throw new RuntimeException("Failed to process typemap: " + typemap_classname, e);
 		}
 	}
 }