diff --git a/etc/platform-configs/hermit/compiler/gnu b/etc/platform-configs/hermit/compiler/gnu
index c0af6aa..1f86edc 100644
--- a/etc/platform-configs/hermit/compiler/gnu
+++ b/etc/platform-configs/hermit/compiler/gnu
@@ -1,3 +1,3 @@
 #!/bin/bash
-COMPILER_OPTS="CC=cc CXX=CC FC=ftn F77=tfn"
+COMPILER_OPTS="CC=cc CXX=CC FC=ftn F90=ftn F77=tfn"
 COMPILER_VERSION_CMD="cc -dumpversion"
diff --git a/etc/platform-configs/laki/compiler/gnu b/etc/platform-configs/laki/compiler/gnu
index 918f7db..50913ec 100644
--- a/etc/platform-configs/laki/compiler/gnu
+++ b/etc/platform-configs/laki/compiler/gnu
@@ -1,3 +1,3 @@
 #!/bin/bash
-COMPILER_OPTS="CC=gcc CXX=g++ FC=gfortran F77=gfortran"
+COMPILER_OPTS="CC=gcc CXX=g++ FC=gfortran F90=gfortran F77=gfortran"
 COMPILER_VERSION_CMD="gcc -dumpversion"