diff --git a/examples/ELASTIC/displace.mod b/examples/ELASTIC/displace.mod
index 6694955889..eab1460242 100644
--- a/examples/ELASTIC/displace.mod
+++ b/examples/ELASTIC/displace.mod
@@ -4,17 +4,17 @@
 
 # Find which reference length to use
 
-if ${dir} == 1 then &
+if "${dir} == 1" then &
    "variable len0 equal ${lx0}" 
-if ${dir} == 2 then &
+if "${dir} == 2" then &
    "variable len0 equal ${ly0}" 
-if ${dir} == 3 then &
+if "${dir} == 3" then &
    "variable len0 equal ${lz0}" 
-if ${dir} == 4 then &
+if "${dir} == 4" then &
    "variable len0 equal ${lz0}" 
-if ${dir} == 5 then &
+if "${dir} == 5" then &
    "variable len0 equal ${lz0}" 
-if ${dir} == 6 then &
+if "${dir} == 6" then &
    "variable len0 equal ${ly0}" 
 
 # Reset box and simulation parameters
@@ -24,17 +24,17 @@ include potential.mod
 
 # Negative deformation
 variable delta equal -${up}*${len0}
-if ${dir} == 1 then &
+if "${dir} == 1" then &
    "displace_box all x delta 0 ${delta} units box"
-if ${dir} == 2 then &
+if "${dir} == 2" then &
    "displace_box all y delta 0 ${delta} units box"
-if ${dir} == 3 then &
+if "${dir} == 3" then &
    "displace_box all z delta 0 ${delta} units box"
-if ${dir} == 4 then &
+if "${dir} == 4" then &
    "displace_box all yz delta ${delta} units box"
-if ${dir} == 5 then &
+if "${dir} == 5" then &
    "displace_box all xz delta ${delta} units box"
-if ${dir} == 6 then &
+if "${dir} == 6" then &
    "displace_box all xy delta ${delta} units box"
 
 # Relax atoms positions
@@ -72,17 +72,17 @@ include potential.mod
 
 # Positive deformation
 variable delta equal ${up}*${len0}
-if ${dir} == 1 then &
+if "${dir} == 1" then &
    "displace_box all x delta 0 ${delta} units box"
-if ${dir} == 2 then &
+if "${dir} == 2" then &
    "displace_box all y delta 0 ${delta} units box"
-if ${dir} == 3 then &
+if "${dir} == 3" then &
    "displace_box all z delta 0 ${delta} units box"
-if ${dir} == 4 then &
+if "${dir} == 4" then &
    "displace_box all yz delta ${delta} units box"
-if ${dir} == 5 then &
+if "${dir} == 5" then &
    "displace_box all xz delta ${delta} units box"
-if ${dir} == 6 then &
+if "${dir} == 6" then &
    "displace_box all xy delta ${delta} units box"
 
 # Relax atoms positions