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-rw-r--r--libcrystfel/src/detgeom.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/libcrystfel/src/detgeom.c b/libcrystfel/src/detgeom.c
index 39b00663..2b38664c 100644
--- a/libcrystfel/src/detgeom.c
+++ b/libcrystfel/src/detgeom.c
@@ -269,6 +269,7 @@ gsl_matrix **make_panel_minvs(struct detgeom *dg)
gsl_matrix_set(M, 2, 2, p->pixel_pitch*p->ssz);
Minvs[i] = matrix_invert(M);
+ gsl_matrix_free(M);
if ( Minvs[i] == NULL ) {
ERROR("Failed to calculate inverse panel matrix for %s\n",
p->name);