diff --git a/opr/params.py b/opr/params.py
index d988245..5a96978 100644
--- a/opr/params.py
+++ b/opr/params.py
@@ -23,6 +23,6 @@
 PRIMER_NOT_REMOVABLE_ATTRIBUTE_ERROR = "This attribute is not removable."
 
 PRIMER_ADDITION_ERROR = "You can only add two Primer objects."
-PRIMER_MULTIPICATION_ERROR = "The primer sequence can only be multiplied by an integer."
+PRIMER_MULTIPLICATION_ERROR = "The primer sequence can only be multiplied by an integer."
 
 PRIMER_MELTING_TEMPERATURE_NOT_IMPLEMENTED_ERROR = "This method for calculating melting temperature has not been implemented."
diff --git a/opr/primer.py b/opr/primer.py
index 940464c..0a93af7 100644
--- a/opr/primer.py
+++ b/opr/primer.py
@@ -8,7 +8,7 @@
 from .params import PRIMER_LOWER_LENGTH, PRIMER_HIGHEST_LENGTH, PRIMER_LOWEST_GC_RANGE, PRIMER_HIGHEST_GC_RANGE
 from .params import PRIMER_READ_ONLY_ATTRIBUTE_ERROR, PRIMER_NOT_REMOVABLE_ATTRIBUTE_ERROR
 from .params import DNA_COMPLEMENT_MAP
-from .params import PRIMER_ADDITION_ERROR, PRIMER_MULTIPICATION_ERROR
+from .params import PRIMER_ADDITION_ERROR, PRIMER_MULTIPLICATION_ERROR
 from .params import PRIMER_MELTING_TEMPERATURE_NOT_IMPLEMENTED_ERROR
 from .functions import molecular_weight_calc, basic_melting_temperature_calc