diff --git a/src/gem/gemdisp.c b/src/gem/gemdisp.c
index 01f277f..96d5851 100644
--- a/src/gem/gemdisp.c
+++ b/src/gem/gemdisp.c
@@ -1631,7 +1631,7 @@ VPUBLIC void Gem_writeDX(Gem *thee, Vio *sock,
 VPUBLIC void Gem_writeTEC(Gem *thee, Vio *sock,
     int fldKey, double *defX[MAXV])
 {
-    char str1[10], str2[10];
+    char str1[16], str2[16];
     int i, j, vec, dim, dimII, dimVV, numVV, numSS;
     VV *vx;
     SS *sm;