diff --git a/lib/slepc/conf/slepc_variables b/lib/slepc/conf/slepc_variables
index de3a9cbcd..685372bce 100644
--- a/lib/slepc/conf/slepc_variables
+++ b/lib/slepc/conf/slepc_variables
@@ -28,10 +28,10 @@ SLEPC_F_SH_LIB_PATH = ${FC_LINKER_SLFLAG}${SLEPC_LIB_DIR}
 
 # Redefine variables in PETSc makefiles
 INSTALL_LIB_DIR = ${SLEPC_LIB_DIR}
-CCPPFLAGS       = ${PETSC_CCPPFLAGS} ${SLEPC_CCPPFLAGS}
-CXXCPPFLAGS     = ${PETSC_CXXCPPFLAGS} ${SLEPC_CXXCPPFLAGS}
-FCPPFLAGS       = ${PETSC_FCPPFLAGS} ${SLEPC_FCPPFLAGS}
-CUDACPPFLAGS    = ${PETSC_CUDACPPFLAGS} ${SLEPC_CUDACPPFLAGS}
+CCPPFLAGS       = ${SLEPC_CCPPFLAGS} ${PETSC_CCPPFLAGS}
+CXXCPPFLAGS     = ${SLEPC_CXXCPPFLAGS} ${PETSC_CXXCPPFLAGS}
+FCPPFLAGS       = ${SLEPC_FCPPFLAGS} ${PETSC_FCPPFLAGS}
+CUDACPPFLAGS    = ${SLEPC_CUDACPPFLAGS} ${PETSC_CUDACPPFLAGS}
 
 # Variables for the different SLEPc modules
 SLEPC_SYS_LIB_BASIC = -lslepcsys