diff --git a/dynamics/spam/CMakeLists.txt b/dynamics/spam/CMakeLists.txt
index 736a37a8..c9bf30e1 100644
--- a/dynamics/spam/CMakeLists.txt
+++ b/dynamics/spam/CMakeLists.txt
@@ -17,6 +17,9 @@ target_include_directories(dycore INTERFACE src/grids)
 target_include_directories(dycore INTERFACE src/io)
 target_include_directories(dycore INTERFACE src/core)
 
+set(PAMC_NDIMS "1" CACHE STRING "PAM-C ndims")
+target_compile_definitions(dycore INTERFACE -DPAMC_NDIMS=${PAMC_NDIMS})
+
 if ("${PAMC_MODEL}" STREQUAL "layermodel")
   target_compile_definitions(dycore INTERFACE -DPAMC_LAYER)
 endif()
diff --git a/dynamics/spam/src/extrudedmodel-common.h b/dynamics/spam/src/extrudedmodel-common.h
index 878c3afa..c0d61bae 100644
--- a/dynamics/spam/src/extrudedmodel-common.h
+++ b/dynamics/spam/src/extrudedmodel-common.h
@@ -10,7 +10,7 @@ uint constexpr ntracers_dycore = 0;
 //////////////////////////////////////////////////////////////////////////////
 
 // Number of Dimensions
-uint constexpr ndims = 2;
+uint constexpr ndims = PAMC_NDIMS;
 } // namespace pamc
 
 #include "params.h"
diff --git a/standalone/mmf_simplified/build/cmakescript_pamc.sh b/standalone/mmf_simplified/build/cmakescript_pamc.sh
index 882545ec..8015476f 100755
--- a/standalone/mmf_simplified/build/cmakescript_pamc.sh
+++ b/standalone/mmf_simplified/build/cmakescript_pamc.sh
@@ -6,6 +6,7 @@
 
 PAM_MICRO="p3"
 PAM_SGS="none"
+PAMC_NDIMS="1"
 PAMC_MODEL="extrudedmodel"
 PAMC_HAMIL="man"
 PAMC_THERMO="constkappavirpottemp"
@@ -36,6 +37,7 @@ cmake      \
   -DPAM_MICRO=${PAM_MICRO}                                        \
   -DPAM_SGS=${PAM_SGS}                                            \
   -DPAM_RAD="none"                                                \
+  -DPAMC_NDIMS=${PAMC_NDIMS}                                      \
   -DPAMC_MODEL=${PAMC_MODEL}                                      \
   -DPAMC_HAMIL=${PAMC_HAMIL}                                      \
   -DPAMC_THERMO=${PAMC_THERMO}                                    \