diff --git a/src/interface.c b/src/interface.c
index 81b5ed6af..2161bcb1c 100644
--- a/src/interface.c
+++ b/src/interface.c
@@ -1497,7 +1497,7 @@ void menu_ui_v3(pixel *vid_buf, int i, int *sl, int *sr, int b, int bq, int mx,
                     drawrect(vid_buf, x+30, y-1, 29, 17, 255, 0, 0, 255);
                     h = n;
                 }
-                if(!bq && mx>=x+32 && mx<x+58 && my>=y && my< y+15&&(sdl_mod & (KMOD_LALT)))
+                if(!bq && mx>=x+32 && mx<x+58 && my>=y && my< y+15&&(sdl_mod & (KMOD_LALT) && sdl_mod & (KMOD_SHIFT)))
                 {
                     drawrect(vid_buf, x+30, y-1, 29, 17, 0, 255, 255, 255);
                     h = n;
@@ -1531,7 +1531,7 @@ void menu_ui_v3(pixel *vid_buf, int i, int *sl, int *sr, int b, int bq, int mx,
                     drawrect(vid_buf, x+30, y-1, 29, 17, 255, 0, 0, 255);
                     h = n;
                 }
-                if(!bq && mx>=x+32 && mx<x+58 && my>=y && my< y+15&&(sdl_mod & (KMOD_LALT)))
+                if(!bq && mx>=x+32 && mx<x+58 && my>=y && my< y+15&&(sdl_mod & (KMOD_LALT) && sdl_mod & (KMOD_SHIFT)))
                 {
                     drawrect(vid_buf, x+30, y-1, 29, 17, 0, 255, 255, 255);
                     h = n;
@@ -1568,7 +1568,7 @@ void menu_ui_v3(pixel *vid_buf, int i, int *sl, int *sr, int b, int bq, int mx,
                     drawrect(vid_buf, x+30, y-1, 29, 17, 255, 0, 0, 255);
                     h = n;
                 }
-                if(!bq && mx>=x+32 && mx<x+58 && my>=y && my< y+15&&(sdl_mod & (KMOD_LALT)))
+                if(!bq && mx>=x+32 && mx<x+58 && my>=y && my< y+15&&(sdl_mod & (KMOD_LALT) && sdl_mod & (KMOD_SHIFT)))
                 {
                     drawrect(vid_buf, x+30, y-1, 29, 17, 0, 255, 255, 255);
                     h = n;
@@ -1604,7 +1604,7 @@ void menu_ui_v3(pixel *vid_buf, int i, int *sl, int *sr, int b, int bq, int mx,
 
     if(b==1&&h!=-1)
     {
-	if(sdl_mod & (KMOD_LALT))
+	if(sdl_mod & (KMOD_LALT) && sdl_mod & (KMOD_SHIFT))
 	{
 		SLALT = h;
 	}
@@ -1614,7 +1614,7 @@ void menu_ui_v3(pixel *vid_buf, int i, int *sl, int *sr, int b, int bq, int mx,
     }
     if(b==4&&h!=-1)
     {
-        if(sdl_mod & (KMOD_LALT))
+        if(sdl_mod & (KMOD_LALT) && sdl_mod & (KMOD_SHIFT))
 	{
 		SLALT = h;
 	}
diff --git a/src/main.c b/src/main.c
index 5ef9ce304..af9dcc6ba 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1833,7 +1833,7 @@ int main(int argc, char *argv[])
                 }
                 else
                 {
-                    if((sdl_mod & (KMOD_LSHIFT|KMOD_RSHIFT)) && !(sdl_mod & (KMOD_LCTRL|KMOD_RCTRL)))
+                    if((sdl_mod & (KMOD_LSHIFT|KMOD_RSHIFT)) && !(sdl_mod & (KMOD_LCTRL|KMOD_RCTRL|KMOD_LALT)))
                     {
                         lx = x;
                         ly = y;
@@ -1856,7 +1856,7 @@ int main(int argc, char *argv[])
                         lb = 0;
                         lm = 0;
                     }
-                    else if((sdl_mod & (KMOD_LALT||KMOD_RALT)) || b==SDL_BUTTON_MIDDLE)
+                    else if(((sdl_mod & (KMOD_LALT||KMOD_RALT)) && !sdl_mod & (KMOD_LALT)) || b==SDL_BUTTON_MIDDLE)
                     {
                         if(y>0 && y<sdl_scale*YRES && x>0 && x<sdl_scale*XRES)
                         {
diff --git a/src/powder.c b/src/powder.c
index 526066377..74ac89f7d 100644
--- a/src/powder.c
+++ b/src/powder.c
@@ -3695,7 +3695,7 @@ int create_parts(int x, int y, int r, int c)
         }
         return 1;
     }
-    if(sdl_mod & (KMOD_LALT))
+    if(sdl_mod & (KMOD_LALT) && sdl_mod & (KMOD_SHIFT))
 	{
         for(j=-r; j<=r; j++)
             for(i=-r; i<=r; i++)