diff --git a/funcs/func_math.c b/funcs/func_math.c
index a838e4f998..4795efcc62 100644
--- a/funcs/func_math.c
+++ b/funcs/func_math.c
@@ -67,9 +67,9 @@ static char *builtin_function_math(struct ast_channel *chan, char *cmd, char *da
 	int argc;
 	char *argv[2];
 	char *args;
-	float fnum1;
-	float fnum2;
-	float ftmp = 0;
+	double fnum1;
+	double fnum2;
+	double ftmp = 0;
 	char *op;
 	int iaction=-1;
 	int type_of_result=FLOAT_RESULT;
@@ -159,12 +159,12 @@ static char *builtin_function_math(struct ast_channel *chan, char *cmd, char *da
 		return NULL;
 	}
 
-	if (sscanf(mvalue1, "%f", &fnum1) != 1) {
+	if (sscanf(mvalue1, "%lf", &fnum1) != 1) {
 		ast_log(LOG_WARNING, "'%s' is not a valid number\n", mvalue1);
 		return NULL;
 	}
 
-	if (sscanf(mvalue2, "%f", &fnum2) != 1) {
+	if (sscanf(mvalue2, "%lf", &fnum2) != 1) {
 		ast_log(LOG_WARNING, "'%s' is not a valid number\n", mvalue2);
 		return NULL;
 	}