diff --git a/src/UnitsAPI/Units.dat b/src/UnitsAPI/Units.dat
index daf0995fcb..fe409e916e 100755
--- a/src/UnitsAPI/Units.dat
+++ b/src/UnitsAPI/Units.dat
@@ -453,7 +453,7 @@ MOLARITY                                        -1         0         0         0
 ....................................................................................................................................
 ....................................................................................................................................
                                                  M         L         T         I         K         N         J         P         S
-ACCOUSTIC INTENSITY                              0         1         0        -2         0         0         0         0         0
+ACOUSTIC INTENSITY                               0         1         0        -2         0         0         0         0         0
 ....................................................................................................................................
 bel                                                B
 neper                                              Np                                  0.869             B
diff --git a/src/UnitsAPI/UnitsAPI.cxx b/src/UnitsAPI/UnitsAPI.cxx
index ba94625ccf..a090fa2d61 100644
--- a/src/UnitsAPI/UnitsAPI.cxx
+++ b/src/UnitsAPI/UnitsAPI.cxx
@@ -118,7 +118,7 @@ void UnitsAPI::CheckLoading (const UnitsAPI_SystemUnits aSystemUnits)
           MDTVLocalSystemUnits.Specify("MOLAR VOLUME","mm\xB3/mol");
           MDTVLocalSystemUnits.Specify("CONCENTRATION","kg/mm\xB3");
           MDTVLocalSystemUnits.Specify("MOLAR CONCENTRATION","mol/mm\xB3");
-          MDTVLocalSystemUnits.Specify("ACCOUSTIC INTENSITY","mm/A\xB2");
+          MDTVLocalSystemUnits.Specify("ACOUSTIC INTENSITY","mm/A\xB2");
           MDTVLocalSystemUnits.Specify("DOSE EQUIVALENT","mm\xB2/s\xB2");
           MDTVLocalSystemUnits.Specify("ABSORBED DOSE","mm\xB2/s\xB2");
           MDTVLocalSystemUnits.Specify("FLUX OF MAGNETIC INDUCTION","kg*mm\xB2/(s\xB2*A)");
diff --git a/src/UnitsAPI/UnitsAPI_Units_dat.pxx b/src/UnitsAPI/UnitsAPI_Units_dat.pxx
index f54cc7f8fa..791aa5909d 100644
--- a/src/UnitsAPI/UnitsAPI_Units_dat.pxx
+++ b/src/UnitsAPI/UnitsAPI_Units_dat.pxx
@@ -456,7 +456,7 @@ static const char UnitsAPI_Units_dat[] =
   "....................................................................................................................................\n"
   "....................................................................................................................................\n"
   "                                                 M         L         T         I         K         N         J         P         S\n"
-  "ACCOUSTIC INTENSITY                              0         1         0        -2         0         0         0         0         0\n"
+  "ACOUSTIC INTENSITY                               0         1         0        -2         0         0         0         0         0\n"
   "....................................................................................................................................\n"
   "bel                                                B\n"
   "neper                                              Np                                  0.869             B\n"