diff --git a/src/sourcemap/sourcemap.zig b/src/sourcemap/sourcemap.zig
index 84076711bd..a95b46d621 100644
--- a/src/sourcemap/sourcemap.zig
+++ b/src/sourcemap/sourcemap.zig
@@ -868,6 +868,13 @@ pub const MappingsData = union(enum) {
             .list => |*list| return list.find(line, column),
             .compact => |compact| {
                 if (compact.findMapping(line, column)) |sm| {
+                    // Validate that values are non-negative before using addScalar
+                    // VLQ decoding can result in negative accumulated values due to negative deltas
+                    if (sm.generated_line < 0 or sm.generated_column < 0 or 
+                        sm.original_line < 0 or sm.original_column < 0) {
+                        return null; // Invalid mapping data - return null instead of panicking
+                    }
+                    
                     return Mapping{
                         .generated = .{
                             .lines = bun.Ordinal.start.addScalar(sm.generated_line),