diff --git a/doc/dynare.texi b/doc/dynare.texi
index 5664c0803cc24c0bb4604ff62446fd3475737106..22267f0b4d8705a689150d3166e7d0beab978fdb 100644
--- a/doc/dynare.texi
+++ b/doc/dynare.texi
@@ -1129,7 +1129,7 @@ trend_var (growth_factor=gA) A;
 
 @end deffn
 
-@deffn Command log_trend_var (growth_factor = @var{MODEL_EXPRESSION}) @var{VARIABLE_NAME} [$@var{LATEX_NAME}$]@dots{};
+@deffn Command log_trend_var (log_growth_factor = @var{MODEL_EXPRESSION}) @var{VARIABLE_NAME} [$@var{LATEX_NAME}$]@dots{};
 
 @descriptionhead
 
diff --git a/preprocessor/DynareBison.yy b/preprocessor/DynareBison.yy
index 87f46eb5262d1f19f4bd33630a0f9c2e31889434..0648cc4706e4fd97d42a1a63337a9434b4cbb929 100644
--- a/preprocessor/DynareBison.yy
+++ b/preprocessor/DynareBison.yy
@@ -110,7 +110,7 @@ class ParsingDriver;
 %token INV_GAMMA_PDF INV_GAMMA1_PDF INV_GAMMA2_PDF IRF IRF_SHOCKS
 %token KALMAN_ALGO KALMAN_TOL SUBSAMPLES OPTIONS
 %token LABELS LAPLACE LIK_ALGO LIK_INIT LINEAR LOAD_IDENT_FILES LOAD_MH_FILE LOAD_PARAMS_AND_STEADY_STATE LOGLINEAR LYAPUNOV
-%token LYAPUNOV_FIXED_POINT_TOL LYAPUNOV_DOUBLING_TOL LYAPUNOV_SQUARE_ROOT_SOLVER_TOL LOG_DEFLATOR LOG_TREND_VAR MARKOWITZ MARGINAL_DENSITY MAX MAXIT
+%token LYAPUNOV_FIXED_POINT_TOL LYAPUNOV_DOUBLING_TOL LYAPUNOV_SQUARE_ROOT_SOLVER_TOL LOG_DEFLATOR LOG_TREND_VAR LOG_GROWTH_FACTOR MARKOWITZ MARGINAL_DENSITY MAX MAXIT
 %token MFS MH_DROP MH_INIT_SCALE MH_JSCALE MH_MODE MH_NBLOCKS MH_REPLIC MH_RECOVER MIN MINIMAL_SOLVING_PERIODS SOLVE_MAXIT
 %token MODE_CHECK MODE_COMPUTE MODE_FILE MODEL MODEL_COMPARISON MODEL_INFO MSHOCKS ABS SIGN
 %token MODEL_DIAGNOSTICS MODIFIEDHARMONICMEAN MOMENTS_VARENDO DIFFUSE_FILTER SUB_DRAWS
@@ -301,7 +301,7 @@ trend_var_list : trend_var_list symbol
                  { driver.declare_trend_var(false, $1, $2); }
                ;
 
-log_trend_var : LOG_TREND_VAR '(' GROWTH_FACTOR EQUAL { driver.begin_trend(); } hand_side ')' log_trend_var_list ';'
+log_trend_var : LOG_TREND_VAR '(' LOG_GROWTH_FACTOR EQUAL { driver.begin_trend(); } hand_side ')' log_trend_var_list ';'
                 { driver.end_trend_var($6); }
               ;
 
diff --git a/preprocessor/DynareFlex.ll b/preprocessor/DynareFlex.ll
index 85ad4018dc129f953760d14fb4c79823deec1179..755bdbe4ac796646e647a31cbbbc8b32dd194e8d 100644
--- a/preprocessor/DynareFlex.ll
+++ b/preprocessor/DynareFlex.ll
@@ -470,6 +470,7 @@ string eofbuff;
 <DYNARE_STATEMENT>deflator {return token::DEFLATOR;}
 <DYNARE_STATEMENT>log_deflator {return token::LOG_DEFLATOR;}
 <DYNARE_STATEMENT>growth_factor {return token::GROWTH_FACTOR;}
+<DYNARE_STATEMENT>log_growth_factor {return token::LOG_GROWTH_FACTOR;}
 <DYNARE_STATEMENT>cova_compute {return token::COVA_COMPUTE;}
 <DYNARE_STATEMENT>discretionary_tol {return token::DISCRETIONARY_TOL;}
 <DYNARE_STATEMENT>analytic_derivation {return token::ANALYTIC_DERIVATION;}
diff --git a/tests/trend_var/fs2000_log_nonstationary.mod b/tests/trend_var/fs2000_log_nonstationary.mod
index 5ae79e16310b4e718d0ba7d3060675f189b4fd1c..51d9a7bdcbf26d775ee19ea560eb39032f20d4e2 100644
--- a/tests/trend_var/fs2000_log_nonstationary.mod
+++ b/tests/trend_var/fs2000_log_nonstationary.mod
@@ -27,8 +27,8 @@
  */
 
 var gM gA;
-log_trend_var(growth_factor=gA) A;
-log_trend_var(growth_factor=gM) M;
+log_trend_var(log_growth_factor=gA) A;
+log_trend_var(log_growth_factor=gM) M;
 var(log_deflator=A) k c y;
 var(log_deflator=M(-1)-A) P;
 var(log_deflator=M(-1)) W l d;