diff --git a/patches/qespresso-5.0.2.diff/PW/src/plugin_initialization.f90 b/patches/qespresso-5.0.2.diff/PW/src/plugin_initialization.f90
index c0c40d69fc..51bdcd8e8e 100644
--- a/patches/qespresso-5.0.2.diff/PW/src/plugin_initialization.f90
+++ b/patches/qespresso-5.0.2.diff/PW/src/plugin_initialization.f90
@@ -49,7 +49,7 @@ SUBROUTINE plugin_initialization()
             call plumed_f_gcmd("setPlumedDat"//char(0),"plumed.dat"//char(0))
             call plumed_f_gcmd("setLogFile"//char(0),"PLUMED.OUT"//char(0))
             call plumed_f_gcmd("setNatoms"//char(0),nat)
-            call plumed_f_gcmd("setMDEngine"//char(0),"qespresso");
+            call plumed_f_gcmd("setMDEngine"//char(0),"qespresso"//char(0));
             call plumed_f_gcmd("setTimestep"//char(0),dt);
             call plumed_f_gcmd("init"//char(0),0);
 
diff --git a/patches/qespresso-6.2.diff/PW/src/plugin_initialization.f90 b/patches/qespresso-6.2.diff/PW/src/plugin_initialization.f90
index c0c40d69fc..51bdcd8e8e 100644
--- a/patches/qespresso-6.2.diff/PW/src/plugin_initialization.f90
+++ b/patches/qespresso-6.2.diff/PW/src/plugin_initialization.f90
@@ -49,7 +49,7 @@ SUBROUTINE plugin_initialization()
             call plumed_f_gcmd("setPlumedDat"//char(0),"plumed.dat"//char(0))
             call plumed_f_gcmd("setLogFile"//char(0),"PLUMED.OUT"//char(0))
             call plumed_f_gcmd("setNatoms"//char(0),nat)
-            call plumed_f_gcmd("setMDEngine"//char(0),"qespresso");
+            call plumed_f_gcmd("setMDEngine"//char(0),"qespresso"//char(0));
             call plumed_f_gcmd("setTimestep"//char(0),dt);
             call plumed_f_gcmd("init"//char(0),0);