diff --git a/osx/boe.consts.h b/osx/boe.consts.h
index 9d4838c0..6ab4c6cf 100644
--- a/osx/boe.consts.h
+++ b/osx/boe.consts.h
@@ -46,6 +46,7 @@
 #define SDF_SKIP_STARTUP		305][4 // preferably deprecated
 #define SDF_LESS_SOUND			305][5
 #define SDF_NO_TARGET_LINE		305][6
+#define SDF_NO_BOAT_SPECIALS	305][7
 #define SDF_RESURRECT_NO_BALM	305][8
 #define SDF_HOSTILES_PRESENT	305][9
 #define SDF_NO_MAPS				306][0
diff --git a/osx/boe.party.cpp b/osx/boe.party.cpp
index d6d6ee98..7df942c9 100644
--- a/osx/boe.party.cpp
+++ b/osx/boe.party.cpp
@@ -527,8 +527,10 @@ void put_party_in_scen(std::string scen_name)
 	// Compatibility flags
 	if(scenario.format.prog_make_ver[0] < 2){
 		PSD[SDF_RESURRECT_NO_BALM] = 1;
+		PSD[SDF_NO_BOAT_SPECIALS] = 1;
 	} else {
 		PSD[SDF_RESURRECT_NO_BALM] = 0;
+		PSD[SDF_NO_BOAT_SPECIALS] = 0;
 	}
 }
 
diff --git a/osx/boe.specials.cpp b/osx/boe.specials.cpp
index b5417979..8999d3bd 100644
--- a/osx/boe.specials.cpp
+++ b/osx/boe.specials.cpp
@@ -238,8 +238,13 @@ bool check_special_terrain(location where_check,eSpecCtx mode,short which_pc,sho
 					*forced = true;
 				}
 				*spec_num = univ.town->spec_id[i];
-				if(!is_blocked(where_check) || ter_special == eTerSpec::CHANGE_WHEN_STEP_ON
-					|| ter_special == eTerSpec::CALL_SPECIAL) {
+				bool runSpecial = false;
+				if(!is_blocked(where_check)) runSpecial = true;
+				if(ter_special == eTerSpec::CHANGE_WHEN_STEP_ON) runSpecial = true;
+				if(ter_special == eTerSpec::CALL_SPECIAL) runSpecial = true;
+				if(!PSD[SDF_NO_BOAT_SPECIALS] && univ.party.in_boat >= 0 && scenario.ter_types[ter].boat_over)
+					runSpecial = true;
+				if(runSpecial) {
 					give_help(54,0);
 					run_special(mode,2,univ.town->spec_id[i],where_check,&s1,&s2,&s3);
 					if (s1 > 0)