diff --git a/Source/misdat.cpp b/Source/misdat.cpp
index d67a3d4668e..1fefe3e9530 100644
--- a/Source/misdat.cpp
+++ b/Source/misdat.cpp
@@ -25,7 +25,7 @@ const MissileData missiledata[] = {
 /*MIS_HLSPWN*/       { &AddFirebolt,               &MI_Firebolt,                           MIF_SHROUD           , MISR_MAGIC,     MFILE_SCUBMISD,  TRUE,      SFX_NONE,    SFX_NONE,    1,        1, ALIGN },
 /*MIS_SOLBRNR*/      { &AddFirebolt,               &MI_Firebolt,                           MIF_SHROUD           , MISR_MAGIC,     MFILE_SCUBMISC,  TRUE,      SFX_NONE,    SFX_NONE,    1,        1, ALIGN },
 /*MIS_MAGMABALL*/    { &AddMagmaball,              &MI_Firebolt,                           MIF_SHROUD           , MISR_FIRE,      MFILE_MAGBALL,   TRUE,      SFX_NONE,    SFX_NONE,    1,        1, ALIGN },
-/*MIS_ACID*/         { &AddAcid,                   &MI_Firebolt,                           MIF_SHROUD           , MISR_ACID,      MFILE_ACIDBF,    TRUE,      LS_ACID,     SFX_NONE,    2,        1, ALIGN },
+/*MIS_ACID*/         { &AddAcid,                   &MI_Acid,                               MIF_SHROUD           , MISR_ACID,      MFILE_ACIDBF,    TRUE,      LS_ACID,     SFX_NONE,    2,        1, ALIGN },
 /*MIS_ACIDPUD*/      { &AddAcidpud,                &MI_Acidpud,                 MIF_NOBLOCK | MIF_AREA | MIF_DOT, MISR_ACID,      MFILE_ACIDPUD,   TRUE,      LS_PUDDLE,   SFX_NONE,    1,        1, ALIGN },
 /*MIS_EXACIDP*/      { &AddMisexp,                 &MI_Acidsplat,                                              0, MISR_ACID,      MFILE_ACIDSPLA,  TRUE,      SFX_NONE,    SFX_NONE,    1,        1, ALIGN },
 /*MIS_EXFIRE*/       { &AddMisexp,                 &MI_MiniExp,                                                0, MISR_NONE,      MFILE_MAGBLOS,   TRUE,      SFX_NONE,    SFX_NONE,    1,        1, ALIGN },
diff --git a/Source/misproc.h b/Source/misproc.h
index c60cc8321ca..2a04f7a61da 100644
--- a/Source/misproc.h
+++ b/Source/misproc.h
@@ -87,6 +87,7 @@ void MI_Lightball(int mi);
 void MI_Poison(int mi);
 void MI_Wind(int mi);
 //void MI_Krull(int mi);
+void MI_Acid(int mi);
 void MI_Acidpud(int mi);
 void MI_Firewall(int mi);
 //void MI_Fireball(int mi);
diff --git a/Source/missiles.cpp b/Source/missiles.cpp
index c9c76796486..98af3b1fdab 100644
--- a/Source/missiles.cpp
+++ b/Source/missiles.cpp
@@ -3555,9 +3555,6 @@ void MI_Firebolt(int mi)
 	case MIS_SOLBRNR:
 		xptype = MIS_EXSOLBRNR;
 		break;
-	case MIS_ACID:
-		xptype = MIS_EXACIDP;
-		break;
 #ifdef HELLFIRE
 	case MIS_PSYCHORB:
 		xptype = MIS_EXPSYCHORB;
@@ -3579,8 +3576,7 @@ void MI_Firebolt(int mi)
 		ASSUME_UNREACHABLE
 		break;
 	}
-	// SetRndSeed(mis->_miRndSeed); // used by MIS_EXACIDP
-	AddMissile(mis->_mix, mis->_miy, mi, 0, mis->_miDir, xptype, mis->_miCaster, mis->_miSource, 0);
+	AddMissile(0, 0, mi, 0, 0, xptype, MST_NA, 0, 0);
 
 	mis->_miDelFlag = TRUE; // + AddUnLight
 }
@@ -3729,6 +3725,29 @@ void MI_Lightball(int mi)
 	mis->_miDelFlag = TRUE;
 }*/
 
+void MI_Acid(int mi)
+{
+	MissileStruct* mis;
+
+	mis = &missile[mi];
+	mis->_mitxoff += mis->_mixvel;
+	mis->_mityoff += mis->_miyvel;
+	GetMissilePos(mi);
+	if (mis->_mix != mis->_misx || mis->_miy != mis->_misy) {
+		CheckMissileCol(mi, mis->_mix, mis->_miy, MICM_BLOCK_ANY);
+	}
+	mis->_miRange--;
+	if (mis->_miRange >= 0) {
+		PutMissile(mi);
+		return;
+	}
+
+	// SetRndSeed(mis->_miRndSeed); // used by MIS_EXACIDP
+	AddMissile(mis->_mix, mis->_miy, mi, 0, mis->_miDir, MIS_EXACIDP, mis->_miCaster, mis->_miSource, 0);
+
+	mis->_miDelFlag = TRUE; // + AddUnLight
+}
+
 void MI_Acidpud(int mi)
 {
 	MissileStruct* mis;