diff --git a/src/USER-MOLFILE/molfile_interface.cpp b/src/USER-MOLFILE/molfile_interface.cpp
index 37f343736d6ae05f34695304e9d1219e45a6121c..9c0c15f1ee3d6524cfe1c01b3aaa3cf155c12c5d 100644
--- a/src/USER-MOLFILE/molfile_interface.cpp
+++ b/src/USER-MOLFILE/molfile_interface.cpp
@@ -107,7 +107,7 @@ extern "C" {
    * J. Phys. Chem., 68, 441 - 452, 1964,
    * except the value for H, which is taken from R.S. Rowland & R. Taylor,
    * J.Phys.Chem., 100, 7384 - 7391, 1996. Radii that are not available in
-   * either of these publications have RvdW = 2.00 Å.
+   * either of these publications have RvdW = 2.00 \AA.
    * The radii for Ions (Na, K, Cl, Ca, Mg, and Cs are based on the CHARMM27
    * Rmin/2 parameters for (SOD, POT, CLA, CAL, MG, CES) by default.
    */