diff --git a/src/engine/engine_print.c b/src/engine/engine_print.c
index e6e404028c..59de9530a9 100644
--- a/src/engine/engine_print.c
+++ b/src/engine/engine_print.c
@@ -787,7 +787,7 @@ void mj_printFormattedData(const mjModel* m, mjData* d, const char* filename,
   printArray("ACT", m->na, 1, d->act, fp, float_format);
   printArray("QACC_WARMSTART", m->nv, 1, d->qacc_warmstart, fp, float_format);
   printArray("CTRL", m->nu, 1, d->ctrl, fp, float_format);
-  printArray("QFRC_APPLIED", m->nq, 1, d->qfrc_applied, fp, float_format);
+  printArray("QFRC_APPLIED", m->nv, 1, d->qfrc_applied, fp, float_format);
   printArray("XFRC_APPLIED", m->nbody, 6, d->xfrc_applied, fp, float_format);
   printArray("MOCAP_POS", m->nmocap, 3, d->mocap_pos, fp, float_format);
   printArray("MOCAP_QUAT", m->nmocap, 4, d->mocap_quat, fp, float_format);
diff --git a/src/render/render_gl2.c b/src/render/render_gl2.c
index 1a7618133a..0c252fbc56 100644
--- a/src/render/render_gl2.c
+++ b/src/render/render_gl2.c
@@ -711,7 +711,7 @@ static void maketext(const char* format, char* txt, float num, int txt_sz) {
     }
 
     // '.' found: strip
-    if (txt[j]=='.') {
+    if (j>=0 && txt[j]=='.') {
       txt[i] = 0;
     }
   }