diff --git a/src/RHEO/pair_rheo.cpp b/src/RHEO/pair_rheo.cpp
index 520a1c4470..8feac7ddcd 100644
--- a/src/RHEO/pair_rheo.cpp
+++ b/src/RHEO/pair_rheo.cpp
@@ -461,13 +461,13 @@ void PairRHEO::coeff(int narg, char **arg)
 
 void PairRHEO::setup()
 {
-  auto fixes = modify->get_fix_by_style("rheo");
+  auto fixes = modify->get_fix_by_style("^rheo$");
   if (fixes.size() == 0) error->all(FLERR, "Need to define fix rheo to use pair rheo");
   if (fixes.size() > 1) error->all(FLERR, "Must have only one fix rheo defined");
   fix_rheo = dynamic_cast<FixRHEO *>(fixes[0]);
 
   // Currently only allow one instance of fix rheo/pressure
-  fixes = modify->get_fix_by_style("rheo/pressure");
+  fixes = modify->get_fix_by_style("^rheo/pressure$");
   if (fixes.size() == 0) error->all(FLERR, "Need to define fix rheo/pressure to use pair rheo");
   if (fixes.size() > 1) error->all(FLERR, "Must have only one fix rheo/pressure defined");
   fix_pressure = dynamic_cast<FixRHEOPressure *>(fixes[0]);